Game 1: Lt. and Mrs. Vernon Post & Lt. and Mrs. David Baxendale - ""Salvation Army Band"" (as Mystery Guest Quartet, and the panel is blindfolded; salaried; after their game, they stand and play the classic holiday song ""Hark! The Herald Angels Sing"" on their 4 brass instruments) Game 2: Miss Sylvette de Aldrey - ""What's My Line? Panelist in Puerto Rico"" (salaried; from San Juan, Puerto Rico; in her country, the panel show is called ""Dodge Game"" and is the top TV show; after her game, she joins the panel when Arlene invites her to do so, and plays the mystery guest round) Game 3: Peter Lind Hayes & Mary Healy (as Mystery Guest Duo) (Peter Lind Hayes appears with a prop knife through his head.) Game 4: Johnny Marks - ""Songwriter, Wrote 'Rudolph The Red-Nosed Reindeer'"" (self-employed; it wasn't mentioned, but he wrote the words and music to the famous song in 1949, by adapting a verse written in 1939 by his brother-in-law, Robert L. May, for a Montgomery Ward department store promot (thetvdb.com)