Derek de Lint

as Grandpa

as Father Jan

as Self(6 eps)

as William van Bronkhorst(8 eps)

as Man

as Rolan Antonov(4 eps)

as Eibert

as Self - Actor

as Opa Ber

as Johan Kievit

as Dokter Rossi

as Sinterklaas / Santa Claus

as Baron van Westerholt

as Victor DuBois(1 ep)

as Twan Benschop

as Karel

as Professor Holzmann

as Old Thom

as Willem Barentsz

as Anatole Deibler

as Casper

as Dokter Rossi

as Levi

as Anton Zwager(32 eps)

as Terence Hill

as King of Dagonaut

as Peter Fontein(1 ep)

as Gerben Kuipers

as Dr. Mandrakis

as Dokter Rossi(58 eps)

as Manfredi Ferrer(1 ep)

as Stephen Brauer(1 ep)

as Vlad

as Head Gray Man(1 ep)

as Vader Richard(1 ep)

as Mr. Bancroft

as Allessandro Censi

as Gerard Cuvee(1 ep)

as Tramp

as Karl Jorgensen

as Theo Van Sertema

as Roberto Rannaldini(3 eps)

as Derek Rayne, Ph.D.(88 eps)

as Dirk Petersen

as Pieter van Buren(2 eps)

as Bertus

as Bob Hooke

as Georges van Baaren(1 ep)

as Alex

as High Centurion Sulat Ray(1 ep)

as Carl van der Meer(1 ep)

as Dr. Estes

as Charles Deveraux

as Peter Koudbier

as Peter

as Lothar de la Rey

as Lothar de la Rey(4 eps)

as Lothar de la Rey(4 eps)

as Gus Morgan

as Abramov

as Abramov(2 eps)

as Inni Wintrop

as Dr. Thost(2 eps)

as Dr. Thost

as Abelard

as Dr. Gerard Bernard(9 eps)

as Franz

as Jan Clopatz

as Chris Brine

as Philippe / Marcel's son-Simone's husband

as Eric Hoogland(12 eps)

as Anton Steenwijk

as Paul de Wit / Nathan Blum

as Karel van Laar(7 eps)

as Jack de Graaf

as Ritsaart

as Lieutenant Steiner

as Erik

as Alex(4 eps)

as Theo van Delft

as Alex

as Mark