Jessica (Angela Lansbury) investigates a mob hit when Seth (William Windom) is asked to help a crime boss (Tige Andrews) shot at a Boston restaurant. Guest star: Vincent Irizarry.
Jon has his hands full with an impressionable teenage girl who runs away--to his house. Meanwhile, Ponch tries to tame his fear of flying long enough to ride in a police helicopter. And the two CHP officers pursue an overloaded van only to find that it is jammed with the Los Angeles Rams cheerleaders on their way to a game at the Coliseum.
Jonathan and Mark visit a halfway house for people who were confined to mental facilities but released because they were deemed no longer a danger to society.
Sam (Scott Bakula) leaps into the life of a blind concert pianist in 1964 who must prevent the death of a young woman. Also stars Dean Stockwell.
Tommy and friends celebrate graduation at the house.
