NBC (8 p.m. ET)
This might also be called The Casting Director Goes Berserk, since a huge and polyglot cast including Big Bird, Phyllis Diller, Telly Savalas and Tom Seaver is crammed into a Valentine’s Day hour of songs and comedy. Even the headliners show up in battalions: Tony Orlando and his son, Paul Anka, his wife and four children, and Marilyn McCoo and Billy Davis Jr. If you wonder what happened to My Funny Valentine: Frank Sinatra had been scheduled to sing it but canceled at taping time because of the flu.