Not from the era without thinking longer about it.
From the 90s though the things that I recall immediately recall are the X-Files episode Small Potatoes https://www.youtube.com/watch?v=uqNC2K4YbK0
And the ending of this Spaced episode https://www.youtube.com/watch?v=5XMkW1btoEM
Oh this too https://www.youtube.com/watch?v=EZnsOZsA7_4