Jacqueline Briggs is a non-canonical character created for the ITV's 2004 adaptation of 4.50 from Paddington. She is the girlfriend of Alfred Crackenthorpe. Alfred and Jacqueline had a blackmail racket going on. She would get into love affairs with various notable people (in Brackhampton he says). Jacqueline would meet with her lovers in various hotel rooms whereupon Alfred would burst in playing the part of the offended husband and then demand payment. Unfortunately for him, at the most recent job, Jacqueline had really fallen for her lover, one Councillor Marchant, and had gone off with him. Alfred's concern is that Jacqueline might reveal his modus operandi and his previous victims might sue him.