Four Lives has arrived on BBC One - here's a full run down of who's on the cast.
The new three-part factual drama tells the story of four victims of serial killer Stephen Port.
Told from the point of view of the families and friends of the four young men - Anthony Walgate, Gabriel Kovari, Daniel Whitworth and Jack Taylor - who were murdered, Four Lives focuses on the fight to uncover the truth about what had happened to their lost sons, brothers and loved ones in the face of a now widely condemned police investigation.
Four Lives 2022 cast
Here's a full rundown of who's on the cast of Four Lives:
Stephen Merchant plays Stephen Port
Sheridan Smith plays Sarah Sak
Tim Preston plays Anthony Walgate
Jakub Svec plays Gabriel Kovari
Rufus Jones plays John Pape
Alexa Davies plays Kiera
Shaun Thomas plays Paul
Ian Puleston-Davies plays Karl Turner MP
Holly Aird plays Jeanette Taylor
Jaime Winstone plays Donna Taylor
Paddy Rowan plays Jack Taylor
Stephanie Hyam plays Jenny Taylor
Robert Emms plays Ricky Waumsley
Ella Kenion plays Mandy Pearson
Samuel Barnett plays Ryan Edwards
Leo Flanagan plays Daniel Whitworth
Leanne Best plays Kate
Watch Four Lives on TV and online
The three-part series will begin at 9PM on Monday, 3 January on BBC One, continuing at the same time on Tuesday, 4 January and Wednesday, 5 January.
Meanwhile all three episodes will be available to watch online on BBC iPlayer from 9PM on Monday, 3 January.
A synopsis of the first episode shares: "When two young men are found dead in London, the police blame their deaths on overdoses. Their loved ones are unconvinced and try to find out the truth."
Speaking previously, Stephen Merchant said: “This is a story that can’t be ignored - how four young lives were lost and their families’ brave attempt to uncover what happened. This factual drama will shed light on their story, so it’s a privilege to be a part of telling it with the brilliant combination of Jeff Pope, Neil McKay and the BBC.”
Sheridan Smith added: “I love playing real life characters - especially an inspirational woman like Sarah Sak - but with it comes responsibility.
"Along with the other families, Sarah went through so much heartache and it would have been easy for her to just accept what she was being told by the police, but something inside made her keep fighting for her son.”