Might have found a connection with The Big Chill and Psycho.... will post if I can gather more information.
EDIT: Alright - here it goes, with some huge help from HHNManics.
"The Big Chill" (ST) features several connections to themes found in Hitchcock's "Psycho"
- "I heard it through the Grapevine" was written by Norman Whitfield.
- "My Girl" features the lyric, "When it's cold outside, I've got the Month of May" (Mother's Day is in May)
- Marvin Gaye's "What's Going On" alludes to Marvin talking to his mother when questioning what is happening around him.
So... thoughts?