Monroe
Sergeant Murray (8 episodes)
Karl Davis
Eduardo (1 episode)
Colin McGregor
Dr. Charles Beck (2 episodes)
Self - Narrator (voice) (18 episodes)
Richard King (1 episode)
Dr. Newman - Scientist #2 (1 episode)
Narrator (voice)
Revengor
Colonel Preston
Jed Bishop (2 episodes)
Jedediah "Jed" Bishop (26 episodes)
Magnus Gemmell
Dr Archie Watson (4 episodes)
DI Steven Grover (4 episodes)
Self - Narrator (voice) (42 episodes)
King Karl (voice)
Dr. James Borans (segment "Get Some")
Paul Brooks
Colin
Elio Sironi
Brendan Doyle
Arthur Forster
Richard
Yates
Holden Radcliffe (27 episodes)
Lord Rupert Mallory (2 episodes)
Lapslie
Sullivan
Gerry
Billy Bingham
Mr. Miracle
DI Charlie Henry (2 episodes)
Tychon (1 episode)
Aeson (2 episodes)
William Barstow
Rhys Kinlan (1 episode)
Tam McGraw
Richard Kendall (2 episodes)
Richard Ford
Himself - Narrator (1 episode)
DI Jack Cloth (6 episodes)
Rutger Simon (10 episodes)
Quintus Lentulus Batiatus (6 episodes)
Alexander Willard (3 episodes)
Batiatus (13 episodes)
Dr. Gerard (1 episode)
Jonathan Carnahan
Prof. Ian Holbourn
Nestor
Mark
Jack Roper (14 episodes)
Jake Osbourne (5 episodes)
Producer (14 episodes)
John Wade (2 episodes)
Inspector Tom Campbell (1 episode)
D.S. Mackenzie Stone (2 episodes)
Dr. Richard Darian
Stangler (2 episodes)
Dr. Jekyll / Mr. Hyde
Executive Producer
Avery McManus (1 episode)
Male Guest
Dr. Robert Dalgety (11 episodes)
Date 1 - Doug
Martin Shepard (2 episodes)
William Wordsworth
Jonathan Carnahan
Narrator (3 episodes)
Narrator (voice) (9 episodes)
Rebus (4 episodes)
Charlie
Terry
Jonathan Carnahan
James Hamilton
Darkie Larche
Simon Moore III
Spendlove James
Dr. Iain McCallum (14 episodes)
Gilmore
Franky Drinkall (6 episodes)
Windscreen Washer
Nick Simon (2 episodes)
Derek Pierce (1 episode)
Neal McBride
Pretty Boy