Apologies if there is already a similar thread. Haven't seen one.
Just thinking of good cameos from either comics/comedy actors or other well-known actors in sitcom. Some memorable ones for me are...
1) Leonard Rossiter in 'Steptoe & Son', in possibly my favourite episode.
2) John Cleese in 'Cheers'.
3) Phil Pope in 'O.F.A.H.'.
4) Jim Broadbent in both Blackadder appearances, but especially in 'The Queen Of Spain's Beard'.
5) Bernard Cribbins in 'Fawlty Towers'.
6) Reese Witherspoon in 'Friends' (showing just what a good comedy actress she is).
7) Steve Edge in 'Peep Show' (possibly his finest performance).
8) Matthew Holness in 'The Office'.
9) Omid Djalili in 'Black Books'.
10) Ken Campbell in 'In Sickness And In Health'.