Wait! Wait! In 'In and Out Disco' clip debuts in 1978, and it either debuted in the second half of Season 9 of Sesame Street in 1978 or Season 10 of Sesame Street? Not Season 11! Can you tell D72jjpilc aka Jon from Muppet Wiki to find out where it debuted in which episode and which season, please?
Can you tell Shane from Muppet Wiki about this, please!