The Witness for the Prosecution — Season 1

When Leonard Vole is accused of murdering society lady Emily French, his solicitor Mayhew clings to the hope that Leonard's wife Romaine will provide the alibi that can save his life.

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.