I remember watching 3 2 1 as a kid. I would be completely baffled as Ted Rogers explained the answer to the bemused contestant stood in front of a speed boat in the "look at what you could have won" moment. I was hugely impressed by the way he did 321 with his fingers though.
Others for consideration :
My Family
The one where Nicholas Lyndhurst goes back in time to the second world war.
Bullseye
Suite life on deck
Hi de hi
But bullseye was great sunday tea time tell, not having that. Totally agree with the rest though plus I would like to add to the list any sitcom with Victoria Wood in it