This was the last appearance of DS Chisholm, played by Patrick Malahide. He appeared in 24 episodes. He first appeared in the first episode Gunfight at the O.K. Laundrette (1979)
George Sweeney (Alfie) previously appeared in All About Scoring, Innit? (1980) as Clifton Fields and later appeared in Last Orders at the Winchester (1993) as Little Pete. John Judd (Williams) previously appeared in Another Bride, Another Groom (1982) as Noisy. Timothy Carlton (Assistant Commissioner) previously appeared in Life in the Fast Food Lane (1985) as Granger. And Thomas Kett (Harry-uncredited) later appeared in It's a Sorry Lorry Morrie (1989) as Harry.
The following actors from this episode later appeared with Dennis Waterman in New Tricks (2003). Richard Briers (Colonel Caplan) appeared in Old Dogs (2006). Diana Quick (Angie) appeared in Meat Is Murder (2009). And Sean Blowers (Security Guard) appeared in Only the Brave (2011)
First new episode after a three year hiatus. The series that followed in 1989 would be Dennis Waterman's last.