Continuity Goof: There is a continuity goof between two scenes concerning the length of stay for the Stones, as well as when they will be leaving.
During the arrival at the hotel suite scene, the hotel concierge asks Dr. Stone to confirm his reservations are correct, as the number of packages seems to imply a longer stay. Dr. Stone confirms the written reservations are correct, they will be staying only for "the weekend."
Later in the episode Jeff is in his bathrobe and is talking to his parents about returning home early. He says there is no reason for him to hang around here till Tuesday. As the three-day weekend law didn't exist till June 28, 1968, this wouldn't have been a three day weekend (in 1963).