White City was a real multi sports stadium including greyhound that closed its doors the year of broadcast of this episode . It was finally demolished the following year in 1985. It was originally built for the 1908 Summer Olympics.
Tony Caunter (Detective Inspector Norton) later appeared again in From Fulham with Love (1985) as Chief Inspector Norton. He previously appeared with Dennis Waterman in Queen's Pawn (1975). And later appeared with him in Shingle Beach (1991). He is perhaps best known for playing Roy Evans in EastEnders (1985) from 1994-2003.
Brian Capron (Fred) previously appeared with Dennis Waterman in Feet of Clay (1978). He appeared again with him in Cry Me a River (2013). He later became best known for playing Richard Hilman in Coronation Street (1960) from 2001-2003.
Arthur Whybrow (Paddy Hurley) later appeared in Minder on the Orient Express (1985) as 'Bozz' Boswell and in The Last Temptation of Daley (1991) as Landlord. He later appeared with George Cole in Alice's Tale (1995)
Colin Farrell (Tasty Tim) later appeared in How to Succeed in Business Without Really Retiring (1993) as Alf. He also later appeared with Dennis Waterman in Object of Desire (2011)