The Irregulars (TV) Cast
The cast of The Irregulars. Updated on October 7, 2025.
26 actors
Henry Lloyd-Hughes
as Sherlock Holmes (8 episodes)

Henry Lloyd-Hughes plays Sherlock Holmes, who is portrayed with a mysterious presence and complex intrigue.

Royce Pierreson
as Dr. Watson (8 episodes)

Royce Pierreson plays Dr. Watson, who acts as the organizer of the Irregulars' missions and is deeply concerned with the safety of London.

McKell David
as Spike (8 episodes)

McKell David plays Spike, a witty member of the Irregulars with an innate ability to gather information.

Thaddea Graham
as Bea (8 episodes)

Thaddea Graham plays Bea, the strong-willed leader of the Irregulars who strives to protect her group and solve supernatural mysteries.

Jojo Macari
as Billy (8 episodes)

Jojo Macari plays Billy, a tough and street-smart member of the Irregulars who is loyal to his friends.

Harrison Osterfield
as Leopold (8 episodes)

Harrison Osterfield plays Leopold, who joins the Irregulars with a hidden royal background and keen intelligence.

Darci Shaw
as Jessie (8 episodes)

Darci Shaw plays Jessie, who possesses supernatural abilities that are essential to the Irregulars' investigations.

Clarke Peters
as Linen Man (8 episodes)

Clarke Peters plays the Linen Man, a mysterious and enigmatic figure connected to the supernatural events in London.

Eileen O'Higgins
as Alice (8 episodes)

Eileen O'Higgins plays Alice, a character from Bea's past whose reappearance has significant implications.

Micah Loubon
as Luke Porter (1 episode)

Micah Loubon's role as Luke Porter is less prominent, with little information available about his character.

Lisa Dwyer Hogg
as Sister Anna (1 episode)
Edward Hogg
as Daimler (1 episode)
Nicola Goodchild
as Archivist (1 episode)
Daniel Fearn
as Barman (1 episode)
Suzie Chard
as Prostitute (1 episode)
Anthony Bessick
as Ring Announcer (1 episode)
Rory McCann
as The Bird Master / Arthur Hilton (1 episode)
John Alan Roberts
as Reporter (uncredited) (1 episode)
Jenny Kent
as Lower Class Woman (uncredited) (1 episode)
Darryl Bradford
as Middle Class Gentleman (uncredited) (1 episode)
Manoj Anand
as Middle Class Professor (uncredited) (1 episode)
Neilesh Ambu
as Book Seller (uncredited) (1 episode)
Ian Whyte
as Plague Doctor (1 episode)
Marli Siu
as Susan Shipley (1 episode)
Tania Nwachukwu
as Nurse (1 episode)
Harriet Turnbull
as Carla Machin (1 episode)
For the best insights and data about the TV show The Irregulars, visit our main The Irregulars page.