Rob Brydon
Dr. Paul Hamilton (12 eps)
Kat Stewart
Dr. Rachel Mann (12 eps)
Kris McQuade
Prof. Pip Cartwright (12 eps)
Peter Kowitz
Max Talbot (12 eps)
Hollie Andrew
Dr. Jude Wardlaw (12 eps)
Damion Hunter
Bill (12 eps)
Tim Draxl
Prof. Mike French (6 eps)
Christian Manon
French Captain (voice) (1 eps)