This episode makes the last reference to former roommate Chrissy Snow. However her name wasn't mentioned, she was referred to as the other girl.
Mickey Deem, the lecherous old man who, presumably, after reading Hank's scandalous newspaper column about the trio, pinches Janet as she bends over in the flower shop also appears as the singing telegram man in 'Father of the Bride' (s5, e13).
This episode involves two of the trio's mothers descending on their apartment and saying they never should've allowed them to live together, as if they were teenagers. This despite the fact that the actors playing Jack and Janet were both in their mid-30s when this episode was made, and the actress playing Terri was 28.