Dr Richard Thompson (2 episodes)

Inspector Neil Beckett (1 episode)

Marc Campese (1 episode)

Isambard Black

Robert

Clifford Raines (1 episode)

Adam Trueman (191 episodes)

David York (8 episodes)

Varro

Lawrence Davis (1 episode)

Major Despard (1 episode)

Dr. David Barbara (1 episode)

Sgt Jim Travis (1 episode)

Officer Nash

Duncan McCallister (6 episodes)

Firmus

(1 episode)

Andrew

Andrew

Self (1 episode)

(2 episodes)

Walter

Schoolboy (1 episode)