The wall of Sammy Davis Jr.'s dressing room is decorated with same glossy photos of David Janssen and Sean Connery that appear sporadically on the wall of Patty and Cathy's bedroom throughout the second season.
The extensive use of Rat Pack-related celebrity guests, e.g. Frank Sinatra Jr., Sammy Davis Jr., Peter Lawford, in the second season was undoubtedly due to fact that Peter Lawford's production company produced the show.
The title is from the request made by the host of the game show To Tell the Truth (1956) to identify the truthful contestant: Will the Real Mr. XXXX Please Stand Up.
Peter Lawford, whose production company produces The Patty Duke Show (1963), has a cameo appearance portraying himself.
It is revealed that the Lane family telephone number is YU 9-4700.