John Koenig (48 Episodes)

Helena Russell (48 Episodes)

Alan Carter (42 Episodes)

Sandra Benes (35 Episodes)

Dr. Mathias (26 Episodes)

Maya (24 Episodes)

Victor Bergman (24 Episodes)

Tony Verdeschi (24 Episodes)

Paul Morrow (24 Episodes)

David Kano (24 Episodes)

Kate (21 Episodes)

Bill Fraser (5 Episodes)

Yasko (8 Episodes)

Ben Vincent (7 Episodes)

Medic (uncredited) (2 Episodes)

Creature (2 Episodes)

June (5 Episodes)

Eagle Pilot (voice) (2 Episodes)

Guido Verdeschi (2 Episodes)

Ed Spencer (3 Episodes)

Alibe (3 Episodes)

Female Alien (1 Episodes)

Main Mission Operative (uncredited) (1 Episodes)

Mentor (1 Episodes)

Ken Johnson (2 Episodes)

Operative (2 Episodes)

Petrov (2 Episodes)

Alien Invisible (1 Episodes)

Stewart (1 Episodes)

Sandstrom (2 Episodes)

Peter Rockwell (2 Episodes)

Joe Ehrlich (2 Episodes)

Professor Hunter (2 Episodes)

Louisa (2 Episodes)

Ken Burdett (2 Episodes)

Henry (2 Episodes)

Dr. Shaw (2 Episodes)

Jack Bartlett (2 Episodes)

Diana Morris (2 Episodes)

Security Guard (2 Episodes)

Gerald Simmons (2 Episodes)

Kara (1 Episodes)

Cantar (1 Episodes)

Regina Kesslan (1 Episodes)

Balhor (1 Episodes)

Humanoid (1 Episodes)

Zarl (1 Episodes)

Captain Michael (1 Episodes)

Spearman (1 Episodes)

Vana (1 Episodes)

Magus (1 Episodes)

Zamara (1 Episodes)

Security Lieutenant (1 Episodes)

Raan (1 Episodes)

Zova (1 Episodes)

Eagle Pilot (uncredited) (1 Episodes)

Ray Torens (1 Episodes)

Charles Logan (1 Episodes)

Pete Irving (1 Episodes)

Commander Gorski (1 Episodes)

Number Eight (1 Episodes)

Main Mission Operative (1 Episodes)

GTV Newscaster (1 Episodes)

Female Operative (1 Episodes)

Lee Russell (1 Episodes)

Captain Zandor (1 Episodes)

Dione (1 Episodes)

Theia (1 Episodes)

Talos (1 Episodes)

Prima ragazza (1 Episodes)

Main Mission Operative (uncredited) (1 Episodes)

Main Mission Operative (uncredited) (1 Episodes)

Main Mission Operative (uncredited) (1 Episodes)

Main Mission Operative (uncredited) (1 Episodes)

Freda (1 Episodes)

Collins (1 Episodes)

Dominix (1 Episodes)

Ted (1 Episodes)

Dan Mateo (1 Episodes)

Aarchon (1 Episodes)

Benjamin Ouma (1 Episodes)

Jane (1 Episodes)

Melita Kelly (1 Episodes)

Steve Abrams (1 Episodes)

Hilary Preston (1 Episodes)

Companion (1 Episodes)

Joan Conway (1 Episodes)

Luke Ferro (1 Episodes)

Jackie (1 Episodes)

Monique Bouchere (1 Episodes)

Darwin King (1 Episodes)

Neman (1 Episodes)

Juliet Mackie (1 Episodes)

Nurse (1 Episodes)

Petros High Priest (1 Episodes)

Bill Lowry (1 Episodes)

Hadin (1 Episodes)

Male Mute (1 Episodes)

Female Mute (1 Episodes)

Survivor (1 Episodes)

Survivor (1 Episodes)

Tony Cellini (1 Episodes)

Commissioner Dixon (1 Episodes)

Jarak (1 Episodes)

Sue Crawford (1 Episodes)

Ernst Linden (1 Episodes)

Jack Tanner (1 Episodes)

Male Alien (1 Episodes)

Arra (1 Episodes)

Anton Zoref (1 Episodes)

Eva Zoref (1 Episodes)

Jim Nordstrom (1 Episodes)

Mike Ryan (1 Episodes)

Smitty (1 Episodes)

Alpha News Service Girl (1 Episodes)

Baxter (1 Episodes)

Sandos (1 Episodes)

Winters (1 Episodes)

Ted Clifford (1 Episodes)

Wayland (1 Episodes)

Laura Adams (1 Episodes)

James Warren (1 Episodes)

Annette Fraser (1 Episodes)

Anna Davis (1 Episodes)

Lew Picard (1 Episodes)

Mirella (1 Episodes)

Stal (1 Episodes)

Old Lady (1 Episodes)

MacDonald (1 Episodes)

Texas (1 Episodes)

Old Crone (1 Episodes)

Brian the Robot (1 Episodes)

Girl (1 Episodes)

Pasc (1 Episodes)

Etrec (1 Episodes)

Lyra / Maurna (1 Episodes)

Johnson (1 Episodes)

Carson (1 Episodes)

Raul Nunez (1 Episodes)

Rescue Eagle Pilot (1 Episodes)

Alien Transporter (1 Episodes)

Alien Strong (1 Episodes)

Dave Reilly (1 Episodes)

Taybor (1 Episodes)

Karen (1 Episodes)

Andrews (1 Episodes)

Slatternly Woman (1 Episodes)

Security Guard (1 Episodes)

Guard (1 Episodes)

A (1 Episodes)

B (1 Episodes)

Sphere (voice) (1 Episodes)

Patrick Osgood (1 Episodes)

Michelle Osgood (1 Episodes)

First Engineer (1 Episodes)

Security Guard (1 Episodes)

Co-Pilot (1 Episodes)

Alphan Woman (1 Episodes)

Grasshopper (1 Episodes)

Eagle Pilot (1 Episodes)

Security Guard (1 Episodes)

Shermeen Williams (1 Episodes)

Vindrus (1 Episodes)

Eddie Collins (1 Episodes)

Mr. Potter (1 Episodes)

Cloud Creature (1 Episodes)

Carolyn Powell (1 Episodes)

Mark Sanders (1 Episodes)

George Crato (1 Episodes)

Carl Renton (1 Episodes)

Peter Garforth (1 Episodes)

Sally Martin (1 Episodes)

Tessa (1 Episodes)

Sam (1 Episodes)

Greg Sanderson (1 Episodes)

Eva (1 Episodes)

Cernik (1 Episodes)

Stevens (1 Episodes)

Guard (1 Episodes)

Dorzak (1 Episodes)

Sahala (1 Episodes)

Yesta (1 Episodes)

Security Guard (1 Episodes)

Elizia (1 Episodes)

Controller / Sares (1 Episodes)

Jelto (1 Episodes)

Blake Maine (1 Episodes)

Kinano (1 Episodes)

Zoran (1 Episodes)

Jerry Travis (1 Episodes)

Revered One (uncredited) (1 Episodes)

Les Johnson (1 Episodes)

Joe Lustig (1 Episodes)

Archon (1 Episodes)

Consul Varda (1 Episodes)

Malic (1 Episodes)

Dorcon Soldier (1 Episodes)

Dorcon Operative (1 Episodes)

Command Center Alphan (1 Episodes)

Medical Officer (1 Episodes)

Voice (1 Episodes)