A couple takes their son on a cruise in an attempt to end his relationship with an unsuitable girl; a May-December couple rethink their romance; an ex-showgirl's glamorous past jeopardizes her new career as a registered nurse.

Crew members make a valiant effort to keep six stowaways a secret from Capt. Stubing; a church member disapproves of her minister's new romance; a nearly-blind woman refuses to admit her problem until Doc intercedes.

Crew members learn that Captain Stubing is under consideration to take over a prestigious cruise ship and go overboard to help their captain make an outstanding impression; a woman unknowingly makes a date with a friend's fiance; a disabled surgeon belittles Doc for practicing aboard a cruise ship until Doc makes a surprising diagnosis. GUEST STARS: Hans Conried, Ben Murphy, Donna Pescow, Carol Lynley, Richard Anderson, Diana Muldaur

Gopher invites his widowed mother onto the ship in the hopes of cheering her up, but is hurt by her seemingly cheerful attitude, which he interprets as an insult to his father. A group of buddies takes a cruise. One of the men meets a woman who is a regular customer at the restaurant where he works. He lies about his identity because he thinks she would be put off by the fact that he is a waiter. A comic's romance with the reporter who is writing a feature about him appears doomed after she takes offense to his act.

The crew is in Australia to work on one of the cruise line's ships based there. And a wealthy man named Farnsworth (Lloyd Bridges) has decided to invite his whole family for a reunion, but in actuality he wants to see who, among them he should keep in his will.

After having spent time with his family, William Farnsworth (Lloyd Bridges) has finally decided who will be kept in his will.