Pernell Roberts Trapper John McIntyre Actor Gregory Harrison Dr. George Alonzo 'Gonzo' Gates Actor Mary McCarty Clara 'Starch' Willoughby, R. N. Actor Charles Siebert Dr. Stanley Riverside II Actor Christopher Norris Gloria 'Ripples' Brancusi, R.N. Actor Brian Stokes Mitchell Dr. Justin 'Jackpot' Jackson Actor Jessica Walter Melanie Townsend McIntyre Actor Marion Yue Actor Trish Stewart Guest Star Simon Scott Arnold Slocum Actor Barrie Youngfellow Guest Star Jesse Welles Guest Star Maxine Stuart Guest Star Mimi Maynard Guest Star Patricia Mattick Guest Star Lucille Benson Guest Star Norman Alexander Gibbs Guest Star Betty Karlen Guest Star Paul Lambert Guest Star John Crawford Guest Star Don Brinkley Writer Murray Golden Director Bernard McEveety Director Joseph Pevney Director Alex March Director Seymour Robbie Director Robert Douglas Director Barry Crane Director Corey Allen Director Alf Kjellin Director Marc Daniels Director Shimon Wincelberg Writer Jack Guss Writer Jackie Cooper Director Ray Brenner Writer Jeff Stuart Writer Deborah Zoe Dawson Writer Frank Glicksman Producer Victoria Johns Writer David Hurwitz Writer