The amazing Vito Scotti guests in this episode (and if you'd like to know just HOW amazing, check out his filmography on IMDb). Without giving anything away, Scotti plays the Bad Guy with aplomb. He seems to really enjoy being the Bad Guy.
In this episode, Peter Tork (Thorkelson is his real last name), who always played the "dumb guy" actually complains about being the dumb guy! And for a moment, in a hospital scene, he actually plays "smart". But that moment is very short. There's only one song featured in this episode, the "flip side" of their recording of Neil Diamond's "I'm A Believer", (I'm Not Your) Steppin' Stone, written by Tommy Boyce and Bobby Hart. Some years later, when Micky Dolenz, Davy Jones, Tommy Boyce and Bobby Hart went on tour, since Columbia Pictures owned the name "The Monkees", the tour was billed as T.G.H.O.T.M.B.T.G.W.W.E.A.T.G.W.S.E. (Which stood for "The Greatest Hits Of The Monkees By The Guys Who Wrote 'Em And The Guys Who Sang 'Em".) Anyway, if you like The Mokees, you'll love this episode.