Special Guest Appearance By: Gavin MacLeod (Mr. Ellsworth)
Co-Starring: Joe Maross (Shubert), George Caldwell (Heavy #1), Mitchel Young-Evans (Berkeley Student)
Written By: Anne Collins
Directed By: Dick Moder
Ep: 40
Disco Devil
Guest Stars: Paul Sand (Del Franklin), Ellen Weston (Angelique), Kerry Sherman (Kathy Munro), Victor Mohica (Lance), Bob Hoy (Norman), Michael Delano (Nick Moreno)
Special Appearance By: Russell Johnson (Colonel)
Special Guest Star: Wolfman Jack (Infra Red)
Co-Starring: Robert Dunlap (Andrew Borden), Frank McRae (Foreman), Dennis J. Stewart (Kerwin)
Featuring: Linda Fernandez (Female Dancer), Betty Bridges (Receptionist), Tom Kratochvil (Voice of IRAC)
Written By: Alan Brennert
Directed By: Leslie H. Martinson
Ep: 41
Formicida
Guest Stars: Robert Alda (Harcourt)
Special Guest Stars: Robert Shields (Doug), Lorene Yarnell (Formicida)
Co-Starring: Stan Haze (Cawley), Ben Young (Chemist)
Featuring: Carol Carrington (Receptionist), Jim Nolan (Watchman), Frank Farmer (Foreman), Neil Elliot (Male Secretary)
Written By: Katharyn Michaelian Powers
Directed By: Alan Crosland
Ep: 42
Time Bomb
Guest Stars: Joan Van Ark (Cassandra), Allan Miller (Reynolds), Ted Shackelford (Adam)
Co-Starring: Ivan Naranjo (Foreman), Fredd Wayne (J.J. MacConnell), Gwenn Mitchell (Guide), René Levant (Guard), Ted Hamaguchi (Ellis), Ernie Orsatti (Reves), Tom Kratochvil (Voice of IRAC)
Written By: David Wise & Kathleen Barnes
Directed By: Seymour Robbie
Ep: 43
Skateboard Wiz
Guest Stars: Eric Braeden (Donalsen), Cynthia Eilbacher (Jamie), Grace Gaynor (Leslie), Ron Masak (Duane), Art Metrano (Friedman), James Ray (John Key), John Reilly (Skye)
Co-Starring: Neil Flanagan (Ketchum), Peter Wise (Kevin), Abraham Alvarez (Lieutenant)
Featuring: David Cadiente (Chuck)
Written By: Alan Brennert
Directed By: Leslie H. Martinson
Ep: 44
The Deadly Dolphin
Guest Stars: Nicolas Coster (Silas Lockhart), Britt Leach (Billy), Albert Popwell (Gaffer), Michael Stroka (Henry), Brian Tochi (Darrell)
Special Guest Star: Penelope Windust (Dr. Sylvia Stubbs)
Co-Starring: Macon McCalman (Goodspeed), Colin Hamilton (The Admiral), Gregory Chase (The Captain), Paul Tuerpe (CPO), Tom Kratochvil (Voice of IRAC)
Written By: Jackson Gillis
Directed By: Sigmund Neufeld, Jr.
Ep: 45
Stolen Faces
Guest Stars: Joseph Maher (Edgar Percy), Kenneth Tigar (John Austin), John O'Connell (Todd Daniels)
Special Guest Star: Bob Seagren (Roman)
Co-Starring: Diane Lander (Nancy), Murray MacLeod (Doctor), Al White (Sergeant Cline), Catherine Campbell (Leslie)
Featuring: Daryle Ann Lindley (Nurse), Harold P. Pruett (Boy), Tom Kratochvil (Voice of IRAC)
Written By: Richard Carr & Anne Collins
Directed By: Leslie H. Martinson
Ep: 46
Pot of Gold
Guest Stars: Dick O'Neill (Pat), Brian Davies (Thackery), Steve-Allie Collura (Bonelli), Arthur Batanides (Maxwell)
Co-Starring: Sherrie Wills (Lisa), Ric DiAngelo (Rancher), Jeanne Bates (Mrs. Walls), Jaime Tirelli (Gino), Gary Epper (Courier), Tom Kratochvil (Voice of IRAC)
Written By: Michael McGreevey
Directed By: Gordon Hessler
Ep: 47
Gault's Brain
Guest Stars: Floyd Levine (Stryker), Cathee Shirriff (Tara Landon), Erik Stern (Turk), Peter Mark Richman (Dr. Crippin)
Special Guest Star: John Carradine (Gault)
Co-Starring: David Mason Daniels (Morton Danzig), Ari Sorko-Ram (Berger), Tom Kratochvil (Voice of IRAC)
Teleplay By: Arthur Weingarten
Story By: John Gaynor
Directed By: Gordon Hessler
Ep: 48
Going, Going, Gone
Guest Stars: Bo Brundin (Zukov), Charlie Brill (Mr. Smith), Kaz Garas (Lucas), Milton Selzer (Captain Louie), Marc Lawrence (Mr. Jones), Mako (Mr. Brown)
Special Guest Star: Hari Rhodes (Como)
Co-Starring: Fil Formicola (Heavy), Jean Ivan Dorin (Pilot), Jim Stein (Officer)
Teleplay By: Anne Collins & Patrick Mathews
Story By: Patrick Mathews
Directed By: Alan Crosland
Ep: 49
Spaced Out
Guest Stars: Rene Auberjonois (Kimball), Steven Anderson (Sylvester), George Cheung (Mr. Munn), Candy Ann Brown (Janet)
Special Guest Star: Paul Lawrence Smith (Simon Rohan)
Co-Starring: Rex Riley (Fan), Peter Marc (Brad), Lester C. Fletcher (Desk Clerk)
Featuring: J.J. Johnston (Security Guard), Ken Wilson (Black Avenger)
Written By: Bill Taylor
Directed By: Ivan Dixon
Ep: 50
The Starships Are Coming
Guest Stars: Tim O'Connor (Colonel Robert Elliot), Jeffrey Byron (Henry Wilson), James Coleman (The Aide), Frank Whiteman (Newsman), David White (The General)
Special Guest Star: Andrew Duggan (Mason Steele)
Co-Starring: Lilibet Stern (Mary Lou), Sheryl Lee Ralph (Bobbie), Doris Dowling (Mrs. Wilson), Jack Kissel (Alien), Ben Chandler (General), Marlena Giovi (Woman), Walt Davis (Guard), Tom Kratochvil (Voice of IRAC), Mario Machado (The Reporter)
Teleplay By: Glen Olson & Rod Baker & Anne Collins
Story By: Glen Olson & Rod Baker
Directed By: Alan Crosland
Ep: 51
Amazon Hot Wax
Guest Stars: Curtis Credel (Eric), Bob Hoy (Marty), Sarah Purcell (Barbi), Judge Reinhold (Jeff), Martin Speer (Billy Dero), Rick Springfield (Anton), Danil Torppe (Jerry)
Special Guest Stars: Michael Botts (Kim), Kate Woodville (Kobler)
Featuring: Gene Krischer (Jim the Engineer)
Written By: Alan Brennert
Directed By: Ray Austin
Ep: 52
The Richest Man in the World
Guest Stars: Jeremy Slate (Marshall Henshaw), Roger Perry (Dunfield), Del Monroe (Thug), Carmen Zapata (The Prime Minister), Barry Miller (Barney)
Special Guest Star: Marlyn Mason (Lucy)
Co-Starring: Joe Warfield (IADC Officer), Buck Young (Foreman), Joe G. Medalis (Lab Man)
Featuring: Charles Young (Ambulance Attendant), Bobby Baum (Cab Driver), Tom Kratochvil (Voice of IRAC)
Written By: Jackson Gillis & Anne Collins
Directed By: Don MacDougall
Ep: 53
A Date With Doomsday
Guest Stars: Donnelly Rhodes (Ward Selkirk), Carol Vogel (Dede), Taaffe O'Connell (Val), John O'Leary (Dr. Roberts), Bob Hastings (George), Arthur Malet (Professor Zander)
Special Guest Star: Hermione Baddeley (Mrs. Thrip)
Co-Starring: Michael Hoit (Blake), Patrick Cranshaw (Codger)
Featuring: Colette Bertrand (Claudine), John Garwood (Guard), Tom Kratochvil (Voice of IRAC)
Written By: Roland Starke & Dennis Landa
Directed By: Curtis Harrington
Ep: 54
The Girl With a Gift For Disaster
Guest Stars: Jane Actman (Bonnie), Ina Balin (Dr. Koren), Dick Butkus (Neil), Charles Haid (Bob Baker)
Special Guest Stars: Raymond St. Jacques (Mayfield), James Sloyan (Mark Reuben)
Co-Starring: Renee Brown (Joan), Dulcie Jordan (Receptionist), Tom Kratochvil (Voice of IRAC)
Written By: Alan Brennert
Directed By: Alan Crosland
Ep: 55
The Boy Who Knew Her Secret
Guest Stars: Michael Shannon (Cameron), John Milford (Mr. Keller), Tegan West (Pete Pearson), Lenora May (Melanie)
Special Guest Stars: Bert Remsen (Dr. Jaffe), Clark Brandon (Skip)
Guest Stars: John Durren (Dale Hawthorn), Robert Sampson (Dr. Akers), Bob Seagren (Bret Cassiday), John Aprea (Dupris), Hal Frederick (The Professor), Brian Davies (Joseph Reichman)
Special Guest Star: James Bond III (T. Burton Phipps III)
Co-Starring: Sherry Miles (Admissions Clerk), Douglas Broyles (Mover)
Written By: Anne Collins
Directed By: John Newland
Ep: 58
Phantom of the Roller Coaster
Guest Stars: Jared Martin (David and Leon Gurney), Marc Alaimo (Pierce), Ike Eisenmann (Randy), Fred Lerner (Kirk), Craig Littler (Thorpe)
Special Guest Star: Joseph Sirola (Harrison Fynch)
Co-Starring: Jocelyn Sommers (Ms. Patrick), Jessica Rains (Secretary), Mike Kopcha (Sergeant), Judith Christopher (Receptionist)
Written By: Anne Collins
Directed By: John Newland
Ep: 59
Phantom of the Roller Coaster, Part 2
Guest Stars: Jared Martin (David and Leon Gurney), Marc Alaimo (Pierce), Ike Eisenmann (Randy), Fred Lerner (Kirk)
Special Guest Star: Joseph Sirola (Harrison Fynch)