In order to insure the success of a big construction deal, Lester swears Mary to secrecy about the identity of his famous houseguest/investor, the Marvelous Marvin Hagler, an effort that nearly sends Mary down for the count.
When Punky bears the brunt of the school bully's aggression, she asks professional boxer Marvin Hagler for advice on self-defense.
Fellow talk show host Alan Thicke discusses his early days playing in a band on a cruise ship. Also riffs hilariously on doing a sex seminar with Dr. Ruth.
