The Witness for the Prosecution - Season 1 - Eps 2: Part 2
Romaine, whose testimony was Leonard's one hope to save him from the gallows, has turned on him, leaving Mayhew's case hopeless and Leonard's fatal verdict imminent.
About The Witness for the Prosecution

Title: The Witness for the Prosecution
First Air Date: 2016-12-26
Last Air Date: 2016-12-27
Status: Ended
Rating: 6.9/10 (from 80 votes)
Language: EN
Seasons: 1
Total Episodes: 2
Network: BBC One
Genres: Crime, Drama, Mystery
Production Companies: Agatha Christie Limited, Mammoth Screen, Acorn Media Enterprises, A+E Studios
Synopsis
The hunt is on to find the murderer of a wealthy glamorous heiress who is found dead in her London townhouse. Based on the short story by Agatha Christie.
Cast

Toby Jones
John Mayhew

Andrea Riseborough
Romaine Heilger

Kim Cattrall
Emily French

David Haig
Sir Charles Carter

Monica Dolan
Janet McIntyre

Billy Howle
Leonard Vole

Paul Ready
Tripp

Tim McMullan
Sir Hugo Meredith

Hayley Carmichael
Alice Mayhew

Dorian Lough
Detective Breem