Fairly big list here:
Blackadder - The Black Seal
Young Ones - Interesting or Summer Holiday
Man About the House - Did You Ever Meet Rommel?
Fawlty Towers - Gourmet Night
Count Arthur Strong - The Day the Clocks Went Back (Rockers vs Urchins)
The Goodies - Kung Fu Capers
Hancock’s Half Hour - The Blood Donor
I’m Alan Partridge - Alan Attraction
Porridge - Happy Release
Rab C Nesbitt - Holiday
Sykes - Football
Would also have shouts for things like City Lights, Detectorists, Only Fools, League of Gentlemen, Mongrels which are just good without standout episodes.