Keep Circulating the Tapes: Several episodes aired by GSN also circulate in their unedited forms (i.e., with original commercials), and can be found on some public-domain DVD compilations or among collectors. One of these episodes is the broadcast of April 25, 1955.
Missing Episode: The first eight months, as the earliest episode GSN has aired (and the one which began a 2008 run of the series) was from August 6, 1952. Several other episodes from 1952-55 are also missing. Here's a comprehensive list.
Real-Life Relative: Two examples back to back on April 18, 1955. First, Ray Goulding's son appeared as the first contestant, his card reading "Ray's Son (Bob had nothing to do with it)"; then that night's guest, Leo Durocher, had a "Secret Wish" that was guessed by his wife on the panel (Lorraine Day).