As mentioned in the episode summary, Peter & Gordon might have also performed "To Know Him Is To Love Him" on this episode. The copy of the 16Oct65 Shindig that I viewed, ran 2 minutes short, which would leave room for "To Know Him Is to Love Him."
Also, The Lovin' Spoonful were scheduled to perform "Other Side of This Life" (a.k.a. "Another Side to this Life") on this episode. But this performance is not known to exist.