Janet's High School Sweetheart is the eleventh episode of season two of Three's Company, and the 17th overall episode of the series. Directed by Bill Hobin, it first aired 29 November 1977 on ABC.
Summary[]
Janet runs into Peter, a high school hero on whom she once had a crush. She invites him over. Jack and Chrissy are amazed at how nervous their usually cool roommate is as she waits for Peter to arrive. When they meet him, Jack is impressed but Chrissy spots him immediately for what he is, a real Don Juan.
While Jack and Chrissy are at the pub, Janet is at home fending off Peter's advances, and getting more and more disenchanted. Peter chases Janet into the bedroom and hits his head on a table, knocking himself out. Just as Chrissy and Jack arrive home to find Janet a mess from Peter attacking her, Peter comes to and starts another attempt. Chrissy comes to Janet's rescue and holds Janet protectively, making Peter come to the conclusion that the reason Janet isn't interested in him is that she and Chrissy have something going. Jack kicks him out.