Chief Dayanidhi has received a tip that the drug syndicate the unit has long pursued is about to attempt dealings in various parts of the island-state. All three teams have been activated and have staked out key areas. We see them right in the heat of their operations. Do they catch the syndicate or does the entire operation get foiled?

Shan is lurking around the streets of Geylang, Singapore late one night and does not want to be seen. The next day a call-girl is found dead in the area. Shan has explaining to do to prove his innocence. Will anyone believe him? Can he even be trusted anymore?

Shan is implicated in the prostitute's murder and is being questioned by higher authorities. Shan is hiding something, but even his best buddy Radha cannot get him to talk.

Chief Dayanidhi discovers something that will rock the entire unit to its core.

Shan tries to convince the Chief of his innocence. The Chief, however, refuses to consider his innocence without evidence. Undercover officers find Shan at Geylang one night. Why would he be there?

Another call girl is being preyed upon by the killer. The Chief's suspicion about Shan increases, though he continues to deny it. Meanwhile, Mugi and Prakash obtain leads on the Geylang murder. Will they be able to prove Shan's innocence? Is Shan indeed telling the truth?

The Chief is furious that Shalini, an online journalist, has written unfavourable comments about the unit's investigation. Shalini reveals her own investigations, which are a step ahead of the unit. Will the unit team up with Shalini to catch the killer?

Shan is ordered to attend counseling sessions with Regina, the in-house criminologist. Shan has harboured infatuation with Regina and is happy for this opportunity to get close to her. Will this work out for Shan?

The Chief sends two of his officers, Nantha and Seelan, on a secret operation. Why? Has he a hidden motive?

The Chief's suspicions are further confirmed. What action will he take? Meanwhile, Seelan tries to mend his relationship with his wife, but to no avail. Why is Manju behaving that way?

Shan and Radha embark on a missing boy case. The deeper they dig, the more skeletons they discover. Can they save the boy?

After tonight, the unit will never be the same again. Watch for revelations that will yield unexpected turns of events and power shifts.

Seelan and Nantha's enmity rises to a new level as trust is questioned and suspicions are blazing.

The unit remembers and mourns its loss, but on the other side acts of betrayal are shaking the unit's very existence.

When Nantha looks at Radha silently, he really is not as cold as he appears. But can Radha tear down the wall that Nantha has built around himself?

Shan and Radha get a tip about a Chinatown slavery ring. Will this lead bring them closer to solving the case?

Mugi uses his influence to spend time with Shalini. Seelan is about to cross over to the dark side. Nantha catches Angel intoxicated on booze! Care to use a moral compass, anyone?

Shalini calls Mugi with some leads about the rich elite kids and their drug suppliers. Mugi uses this opportunity to rope in Shalini for the stakeout, leaving Prakash out. Will Prakash endure this insult or will he confront Mugi and put him in his place?

The unit has long grappled with the existence of an underground drug syndicate. Today we finally see them, or, rather, the man behind the syndicate. Bose!

Mugi is hot on the heels of the drug syndicate but lands himself in hot water when he bites off more than he can chew. Will Prakash save the day?

Mugi is in serious trouble and the unit must do something to save him. Meanwhile, we find out about Angel's real background.

A dead infant has been found, and it looks like foul play is at work. Regina concludes that the perpetrator must be someone who is mentally ill. But on the personal front, even sane individuals are sidestepping sanity's blurred line, doing things that they are not supposed to do. It is all in the mind, or rather, out of their minds?

Regina develops a deep interest in Nantha's attitude and mannerisms. She takes it upon herself to study him and to find out more about him. Will she unearth more than she bargained for?

Shalini has gathered enough clues to cast doubt on Mugi's charge. She approaches Seelan with the list. Seelan assigns Prakash to nab the suspected kids from the elite society. The 'FLYING HIGH' operation kickstarts. Nantha and Seelan get nearer to nabbing the criminal responsible for the infant's death. Will both teams fly high or fall flat?

It is time for painful truths to be told, seen and heard. Shan sees something he should not see. Nantha hears something he does not want to hear. Mugi must utter something he does not wish to say. Let it sting.

A serial killer is on the loose. Young Indian girls are being raped and killed. Nothing will ever be the same for anyone.

Vithya notices Shan's grief but is unable to help him. Manju spots Seelan and Regina. And lo and behold! The serial killer strikes again. But this time, he is too close for comfort.

Radha finds out about her sister's secret activities. When Nantha confronts Angel about it, things get out of hand. Meanwhile, Manju's secret life is revealed. Is her story taking a whole new twist?

After harboring the grudge for days, Shan finally confronts Seelan about his dalliance with Regina and things get messy. Will they become too caught up in their personal mess to realise that a snake is inching its way close?

The one who shall not be named inches closer and gets under the skin of a loved one. He has wormed his way too close for comfort. Where will this lead?

When a loved one is found dead, the team is close to crumbling under the emotional upheaval. But the predator must be caught, so the team needs to pull it together. Weak links need to be cut. Who will it be? Will they recover in time to nab the serial killer?

The team is interrogated about the Chief's death. Will this reveal new surprises? Meanwhile, Pravin resurfaces again. This time, his eyes are on someone within the team. Who is that?

Radha offers herself as a scapegoat to lure Pravin out, amidst protests from her team. Will this plan work?

Nantha is impressed with Radha's commitment to friendship. Does this spell love? Is Nantha ready to embrace love in his life again?

Regina chances upon Manju and notices her ill health. Will this affect her relationship with Seelan? And after a botched attempt on the stakeout, the unit is stranded in a sea of self-recriminations and guilt! Will they drown or dive deeper to find the parasite?

Radha goes as a human bait to lure Pravin out. But Pravin outsmarts them. How? Watch him watching them!

Radha is in the clutches of manic Pravin. If you think you know how sick Pravin can get, think again. The slow torture that Radha goes through is a worse fate than death itself. Nothing will ever be the same.

The unit receives a mysterious parcel. It is a DVD containing footage with clues about Radha's location. The psychopath is riddling the unit to find Radha. The deadline is one hour. Will they find her? And when they do find a body at the end, is it indeed Radha or someone else?

Will Radha survive the fate that Pravin carved out for her? Watch this week's final episode where nothing and no one will ever be the same.

If there are three words to say about life: "It goes on." Radha is gone but the unit must stay afloat and rectify all their mistakes and misjudgments. As a first step, a new female officer comes to replace Radha. How will Suganya cope with this unit's intense dynamics? Meanwhile, Mugi and Prakash manage to discover Pravin's exact location. Will this signal the end of Lucifer?

Behind every successful man, there is a woman, they say. Behind every maniac, there may be several. What is the story of Pravin? Let's rewind and watch how the boy next door became a maniac on the loose.

Pravin's mother catches him in a 'compromising' situation with his tuition teacher. The tyrannical mother will not let this slide, will she? Watch as the scars grow deeper.

Pravin learns to stand on his own feet with a new-found mentor – Ragu. But his scarred heart finds a reprieve in a girl called Priya. Will she mend his heart?

Pravin does something for Priya which gets him into more trouble. But Pravin manages to catch a ray of sunlight, called Regina, in that gloom.

Pravin leaves his insecurities and bares his soul to Regina. Will she accept him? Meanwhile, it is back to reality for the unit which must forge ahead to nab Pravin.

Mugi and Prakash are trying to win over Suganya. But on a more serious note, Seelan must make a drastic decision to ensure his unit's safety and success. Will Shan suffer the brunt of this decision?

The team is putting together the puzzle pieces and with Regina's help, they finally put a face to the maniac's name and crimes. The hunt begins today!

Based on surveillance of his friends, the team is getting near to Pravin's trail. But Pravin prepares for his next murder so that he can leave Ragu's house scot-free in a masquerade.

Pravin emerges from his hideout. But the team is prepared. Or are they? It is an intense chase. It is the day of reckoning. It is the final showdown. Pravin versus Team Vettai. Buckle up, people! Many scores are to be settled.

The final showdown between Pravin and Team Vettai. One side will go down. Which will it be?

Putting behind the trauma of all they have gone through; the team is back to its normal routine. But Seelan finally discovers why his wife is cold toward him. Is it too late for him to mend her broken heart and soul?

"You can shed tears that she is gone,

Or you can smile because she has lived. Your heart can be empty because you cannot see her, or you can be full of the love you shared. You can turn your back on tomorrow and live yesterday,

Or you can be happy for tomorrow because of yesterday. You can remember her only that she is gone, or you can cherish her memory and let it live on. You can cry and close your mind,

Be empty and turn your back. Or you can do what she would want: smile, open your eyes, love and go on."

At the end of the day, they are just human after all. Will Seelan emerge from this loss as a stronger person or crumble under the weight of the pain? Stand by Seelan as he endures his ultimate loss.

Seelan tries his best to recover from his loss. Mugi has his heart broken by Suganya and Prakash. Outwardly everything seems fine. However, the unit is grappling with unsolved mysteries. Watch them tie up loose ends in their personal lives before standing by for their biggest storm yet.

The chief's murder file is reopened. But Seelan hands in his resignation letter. What is his real motive for doing so?

Nantha loses his cool when Suganya mentions Radha casually. But he loses it even more when Regina tries to prod him about his past with an officer called Arthi. Radha and Arthi. The two chapters in Nantha's life. How similar or different are they?

We rewind back to Nantha's cadet training days and relive how he meets a girl called Arthi. How does Arthi help Nantha break out from his self-imposed wall? How does she end his inner struggle and become a ray of sunshine in his dark, gloomy life.

Arthi has fallen head over heels in love with Nantha. But will he feel the same for her? Or will he push her away like he always pushes love out of his life?

After months of dead ends, there is finally a breakthrough in the Chief's murder case. Will this important clue lead the unit to answers?

Angel finds herself in a deep mess with Bose. She tries to leave his clutches, but to no avail. Can Nantha help her?

The lead that will bring the missing puzzles together to form a bigger picture – The $200 Man is nabbed today. What will he reveal about the Chief's murder?

Questions on everyone's mind: Who is the fox? Who is the spy? Who has been leaking information to a drug syndicate all this time? Could it really be someone from the unit?

No one is born a criminal. We are all the product of our circumstances. What drove Nantha to be who he is? Rewind back to see Nantha's living conditions as a young boy and the entry of Bose in his life.

Nantha's mother, Vatsala, endures all kinds of torture at the hands of vultures who want to tprey on her pitiful situation. Then she meets Bose. How will he change her life?

Nantha's life and aspirations take a turn when Bose tells him what to do in his life. Nantha is left with little choice but to agree.

Arthi puts herself on the line to catch a criminal. But this ends up as another turbulent turning point in Nantha's life.

Dayanidhi's unexpected murder has been an unsolved mystery in the unit until now. Events leading up to that gruesome murder unfold tonight!

Seelan attempts to connect all the dots with the only lead that he has - the $200 man! What connects this man with the Chief's murder?

Seelan determines that Nantha is the informer within the unit. He activates the unit and assembles a team to track down Nantha and Bose. Where is Nantha hiding? Will Seelan be able to close in on him? See the chase from Seelan's point of view.

While Seelan was hunting high and low for him, where was Nantha? Witness all of Nantha the fugitive's steps and strategies tonight!

Nantha is on the run. All that is on his mind is to save Bose and Angel. How will he do that? He sees no way out. But for a man with nothing to lose there is little that can stop him from getting what he wants. What is Nantha going to do? How many lives will be put at risk?

Nantha takes a bus hostage in a desperate final attempt to save Angel and Bose. Will he succeed? Even if he saves them, though, what will happen to him? Who will emerge victorious in the battle between Seelan and Nantha?