Series 1

• "The Hidden Hand" (14 November 1991)^[4]
• "Unquiet Graves" (21 November 1991)
• "Ratlines" (28 November 1991)
• "Bloody Sunday" (5 December 1991)
• "Murder in Mississippi" (12 December 1991)
• "Prisoners of Propaganda" (19 December 1991)^[5]

Series 2

• "Deep Sleep" (29 June 1992)^[6]
• "Birds of Death" (6 July 1992)^[7]
• "Drowning by Bullets" (13 July 1992)^[8]
• "The Last Days of Aldo Moro" (20 July 1992)^[9]
• "The Hidden Holocaust" (27 July 1992)^[10]
• "Death of a Democrat" (3 August 1992)^[11]
• "Bad Blood" (10 August 1992)^[12]
• "The Robert Kennedy Assassination" (17 August 1992)^[13]

Series 3

• "The Soviet Wives Affair" (20 January 1994)^[14]
• "White Lies" (27 January 1994)^[15]
• "The Dambusters Raid" (3 February 1994)^[16]
• "Dead or Alive?" (10 February 1994)^[17]
• "The Lynchburg Story" (17 February 1994)^[18]
• "Suicide Island" (24 February 1994)^[19]

Special

• "The Roswell Incident" (28 August 1995)^[20]

Series 4

• "The Battle of Goose Green" (11 July 1996)^[21]
• "The Whitechapel Murders" (25 July 1996)^[22]
• "The Voyage of the St. Louis" (1 August 1996)^[23]
• "Mutiny in the RAF" (8 August 1996)^[24]
• "Harold Wilson – the Final Days" (15 August 1996)^[25]
• "Konkordski" (22 August 1996)^[26][27]
• "Hello Mr President" (21 January 1997)^[28]

Series 5

• "Lords of the Underworld" (23 June 1997)^[29]
• "The Tragedy of HMS Glorious" (30 June 1997)^[30]
• "Breaking the Sound Barrier" (7 July 1997)^[31][32]
• "Gold Fever" (14 July 1997)^[33]
• "Spying for Love" (21 July 1997)^[34]

Specials – Indian Summer season

• "The Forgotten Famine" (12 August 1997)^[35]
• "The Cawnpore Massacres" (14 August 1997)^[36]
• "Bloody Partition" (25 August 1997)^[37]

Series 6

• "The Voyage of the Exodus" (11 May 1998)^[38]
• "The Porn King, the Stripper and the Bent Coppers" (18 May 1998)^[39]
• "The Chair" (1 June 1998)^[40]
• "Dad's Army" (8 June 1998)^[41]
• "Killer Flu" (15 June 1998)^[42]
• "The Berlin Airlift" (29 June 1998)^[43]
• "Purple Secret – In Search of Royal Madness" (6 July 1998)^[44][45]
• "Winter of Discontent" (13 July 1998)^[46]
• "Witch Hunt" (20 July 1998)^[47]
• "D-Day Disaster" (27 July 1998)^[48]
• "Kinsey's Paedophiles" (10 August 1998)^[49]

Series 7

• "The Great Train Robbery" (10 August 1999)
• "The Hidden Jews of Berlin" (17 August 1999)
• "Hitler's Search for the Holy Grail" (19 August 1999)
• "Mau Mau" (24 August 1999)
• "The People's Duchess" (31 August 1999)
• "Sex and the Swastika" (7 September 1999)^[50]
• "Bunny Girls" (14 September 1999)^[51]
• "Miracle on the River Kwai" (21 September 1999)
• "The Great Fog" (28 September 1999)
• "Execution at Camp 21" (5 October 1999)

Special

• "The Few" (25 July 2000)

Series 8

• "The Duchess and the Headless Man" (10 August 2000)^[52]
• "Funny Money" (17 August 2000)
• "Last Train from Budapest" (24 August 2000)^[53]
• "Prisoners of the Kaiser" (31 August 2000)
• "Mutiny – The True Story of the Red October" (7 September 2000)
• "Natural Born Americans" (14 September 2000)
• "Children of the Iron Lung" (21 September 2000)

Series 9

• "Orphans of the Airlift" (9 August 2001)
• "The Search for the Struma" (16 August 2001)
• "The Lost Legions of Varus" (23 August 2001)
• "Television in the Third Reich" (30 August 2001)
• "Wartime Crime" (6 September 2001)
• "Spanish Armada" (13 September 2001)
• "The Falklands – Exocet!" (5 January 2002)

Series 10

• "Charge of the Light Brigade" (6 June 2002)
• "The Comet Cover-Up" (13 June 2002)
• "Witchfinder General" (20 June 2002)
• "Magic at War" (27 June 2002)

First World War sub-series:

• "The Crucified Soldier" (4 July 2002)
• "The War That Made the Nazis" (11 July 2002)
• "Horror on the Home Front" (18 July 2002)
• "Dogfight – The Mystery of The Red Baron" (25 July 2002)

Series 11

• "Brighton Bomb" (15 May 2003)
• "Hitler of the Andes" (22 May 2003)
• "Costa del Crime" (29 May 2003)
• "The Affair" (5 June 2003)
• "The Strangest Viking" (12 June 2003)
• "The Nazi Officer's Wife" (19 June 2003)

Specials

• "Brinks Mat – The Greatest Heist Part 1" (24 November 2003)
• "Brinks Mat – The Greatest Heist Part 2" (1 December 2003)
• "Who Kidnapped Shergar?" (18 March 2004)

Series 12

• "Beasts of the Roman Games" (7 June 2004)
• "Britain's Boy Soldiers" (14 June 2004)
• "The Royal Mummy" (21 June 2004)
• "Sex Bomb" (28 June 2004)
• "Sink the Belgrano" (5 July 2004)
• "The Nazi Expedition" (12 July 2004)

Series 13

• "The Mystery of the Burnt Mummy" (10 November 2013)
• "Queen Victoria and the Crippled Kaiser" (17 November 2013)
• "Finding Babylon's Hanging Garden" (24 November 2013)^[54]
• "New Secrets of the Terracotta Warriors" (8 December 2013)
• "The Dambusters' Great Escape" (30 March 2014)
• "Return of the Black Death" (6 April 2014)

Series 14

• "The Real Noah's Ark" (14 September 2014)
• "Hitler's Hidden Drug Habit" (19 October 2014)
• "WW1's Forgotten Heroes" (2 November 2014)^[55]
• "The Great Wall of China – The Hidden Story" (30 November 2014)

Series 15

• "London's Lost Graveyard – The Crossrail Discovery" (19 July 2015)
• "Prince Philip – the Plot to Make a King" (30 July 2015)^[56]
• "Hunt for the Artic Ghost Ship" (4 August 2015)
• "The Other Prince William" (27 August 2015)
• "First Humans – The Cave Discovery" (27 September 2015)
• "Cleopatra's Lost Tomb" (4 October 2015)
• "China – Treasures of the Jade Empire" (18 October 2015)
• "Sex Change Spitfire Ace" (24 October 2015)
• "Britain's Medieval Vampires" (31 October 2015 More4)

Series 16

• "Shakespeare's Tomb" (26 March 2016)^[57]
• "The Mystery of the Crossrail Skulls" (24 April 2016)
• "Jutland – WW1's Greatest Sea Battle" (21 May 2016)
• "Messages Home – Lost Films of the British Army" (26 June 2016)
• "China's Forgotten Emperor" (3 July 2016)^[58]
• "Saddam Goes to Hollywood" (24 July 2016)
• "Heroes of Helmand – The British Army's Greatest Escape" (16 August 2016)
• "Secrets of a Police Marksman" (18 August 2016)
• "The Good Terrorist" (27 August 2016)
• "The Last Heroes of the Somme" (13 November 2016)
• "Pearl Harbor – The New Evidence" (10 December 2016)
• "Titanic – The New Evidence" (1 January 2017)

Series 17

• "Dunkirk – The New Evidence" (2 July 2017)
• "Secrets of China's Forbidden City" (9 July 2017)
• "Egypt's Great Pyramid – The New Evidence" (23 September 2017)
• "Britain's Forgotten Army" (12 November 2017)
• "Holocaust – The Revenge Plot" (27 January 2018)
• "Lost Cities of the Maya – Revealed" (11 February 2018)
• "The First Brit – Secrets of the 10,000 Year Old Man" (18 February 2018)
• "Hannibal's Elephant Army – The New Evidence" (25 February 2018)
• "Churchill's Secret Affair" (4 March 2018)
• "Jesus' Female Disciples" (8 April 2018)

Series 18

• "Skeletons of the Mary Rose – The New Evidence" (7 September 2019)