Rolan Antonov / ... 4 episodes, 2022
Old Henrik Viiding 1 episode, 2018
Dr. Mandrakis (as Derek Lint)
Gerard Cuvee (2 episodes, 2002)
Censi, Allessandro (as Derek De Lint)
Pieter van Buren (2 episodes, 2011)
Derek Rayne, Ph.D. / ... (87 episodes, 1996-1999)
Dirk Petersen (as Derek De Lint)
Carl / ... (2 episodes, 1999-2000)
Dr. Estes (as Derek De Lint)
Dr. Gerard Bernard (9 episodes, 1989-1990)
Paul de Wit / Nathan Blum
Karel van Laar (7 episodes, 1983-1984)
Nick de Ruyter 12 episodes, 2016