Holland (4 episodes)

Wilkins

Dr. Mackenzie (3 episodes)

First Order Officer

Captain Pryce

Alfred Graves (28 episodes)

Konrad

DS Peter Jakes (12 episodes)

Peter Jakes (2 episodes)

Squirrel-Huntin' Sam McCoy (3 episodes)

Carruthers

Jez Flambard (1 episode)