Beat the Devil
I just noticed Jane Connell, who played Agnes Gooch in the film version of Mame with Lucy and Bea had a cameo in the "Beat the Devil" episode of Maude.
I love little connections like that.
Conrad Janis and Billy Sands who were also in the episode would appear a year later on the other All In The Family spin-off The Jeffersons' episode, Jefferson Airplane...