David McKail

as Fifth Geographer

as Johann Schmidt's Artist

as Minister

(1 episode) as Date's Father

as Frink

(1 episode) as Lord Mayor

(1 episode) as Grumps

(1 episode) as Josef Slvanski

(1 episode) as Alastair Reid

(1 episode) as Usher

as Coroner

(1 episode) as Clifford Jennings

(1 episode) as Dr. Fyfe

(1 episode) as Mr. Muir

(42 episodes) as Dr. Mckenzie / Pathologist

(1 episode) as Macgregor

(1 episode) as Dr. McKenzie

as Dr English

(1 episode) as Bill Nigh

(1 episode) as Voice Rec for Hilton (voice) (uncredited)

(3 episodes) as Robertson

as Consultant

(1 episode) as Toby Rowlands

(2 episodes) as Doctor Losberne

(1 episode) as Derek Munro

(1 episode) as William Penn

(1 episode) as The Rt. Hon. John Hope

(1 episode)

as Dad

(1 episode) as Councillor Doyle

as Sergeant Kyle

(1 episode)

(3 episodes) as John Ferguson

(1 episode) as Mackenzie

(3 episodes) as Jack Smithson

(1 episode) as Evert

(1 episode) as Editor

(1 episode)

as Lac Arnold (uncredited)

as Oscar

(1 episode) as Fisher

(1 episode) as Bruce Fairlight

(2 episodes) as Sergeant Kyle