Material relating to Episode 20 of Z Cars Series 4, titled 'I Love You Bonzo', broadcast 20 January 1965 and produced by the BBC. Exercise books containing handwritten screenplay, and a screenplay by Keith Dewhurst, with casebook material by William Prendergast.

In the episode, DC Lynch is struggling to solve a supermarket robbery. Brian, a drunk lets slip that he trained a burglar known as Arthur who never leaves a trace. Arthur is so cocky he decides sleep, on the job, waking to found by Smith and Weir.