Is Daker the first actor to reapppear as a different character? beating Rula Lenska and half the cast of Minder On The Orient Express. I did like Peter Capaldi's role here. Interesting suggestions about him becoming a future Minder...
I think this award might go to James Marcus, who has a brief appearance as the villain Bertie in 'Caught In The Act, Fact' and would later appear as Phil (the ticket man) in 'The Long Ride Back To Scratchwood'.
I think he's also the eponymous Morrie in "It's a Sorry Lorry..."?
I thought this episode was great. Another chance for Dennis Waterman to be his character with the actress who he dates in the episode. I like how Arthur handles the phones but it unaware why the police are going after him until he finds out why. Really got to sympathise for Arthur.