Professor Marcus

Claude, alias 'Major Courtney'

Louis, alias 'Mr. Harvey'

Harry, alias 'Mr. Robinson'

'One-Round', alias 'Mr. Lawson'

Mrs. Wilberforce

The Superintendent

The Sergeant

The Barrow Boy

Large Lady (uncredited)

Hypatia (uncredited)

Cab Driver (uncredited)

Burglar (uncredited)

Parcels Clerk (uncredited)

Junk Man (uncredited)

Miss Pringle (uncredited)

Security Van Driver (uncredited)

Station Master (uncredited)

Security Guard (uncredited)

Second Cab Driver (uncredited)

Lettice (uncredited)

Detective (uncredited)

(uncredited)

Constable (uncredited)

Radio Car Policeman (uncredited)

Nervous Man (uncredited)

Pavement Artist (uncredited)

Detective at Parcels Office (uncredited)

Policeman (uncredited)

Constance (uncredited)