
Grandpa

Father Jan

Rolan Antonov (4 episodes)

William van Bronkhorst (8 episodes)

Man

Eibert

Victor DuBois (1 episode)

Peter Fontein (1 episode)

Opa Ber

Johan Kievit

Dokter Rossi

Sinterklaas / Santa Claus

Baron van Westerholt

Twan Benschop

Professor Holzmann

Old Thom

Willem Barentsz

Anatole Deibler

Dokter Rossi

Anton Zwager (32 episodes)

Terence Hill

King of Dagonaut

Gerben Kuipers

Dr. Mandrakis

Dokter Rossi (50 episodes)

Manfredi Ferrer (1 episode)

Vader Richard (1 episode)

Stephen Brauer (1 episode)

Head Gray Man (1 episode)

Gerard Cuvee (1 episode)

Mr. Bancroft

Allessandro Censi

Karl Jorgensen

High Centurion Sulat Ray (1 episode)
Carl van der Meer (1 episode)

Theo Van Sertema

Roberto Rannaldini (3 episodes)

Derek Rayne, Ph.D. (88 episodes)

Dirk Petersen

Bob Hooke

Charles Deveraux

Peter Koudbier

Peter

Lothar de la Rey

Lothar de la Rey (4 episodes)

Gus Morgan

Dr. Gerard Bernard (9 episodes)

Abramov

Inni Wintrop

Abelard

Jan Clopatz

Chris Brine

Philippe / Marcel's son-Simone's husband

Eric Hoogland (12 episodes)

Anton Steenwijk

Paul de Wit / Nathan Blum

Karel van Laar (7 episodes)

Jack de Graaf

Ritsaart

Lieutenant Steiner

Erik

Theo van Delft

















