| Bonar Colleano | Dan MacDonald | 
    
    
      | Susan Shaw | Pat | 
    
    
      | Renée Asherson | Sally | 
    
    
      | Earl Cameron | Johnny Lambert | 
    
    
      | Moira Lister | Maisie | 
    
    
      | Max Adrian | Charlie Vernon - acrobat / George | 
    
    
      | Joan Dowling | Pamela, Maisie's sister | 
    
    
      | James Robertson Justice | Engine Room Officer Trotter | 
    
    
      | Leslie Phillips | Harry | 
    
    
      | Alfie Bass | Alf | 
    
    
      | John Longden | DI Williams | 
    
    
      | Michael Golden | Customs Officer Andrews | 
    
    
      | Christopher Hewett | Mike | 
    
    
      | John Adams | Plainclothes Policeman in Squad Car (uncredited) | 
    
    
      | John Arnatt | Squad Car Officer (uncredited) | 
    
    
      | Mae Bacon | Ethel the Barmaid (uncredited) | 
    
    
      | Ian Bannen | Garage attendant (uncredited) | 
    
    
      | George Benson | George (uncredited) | 
    
    
      | Arthur Bentley | Pamela's Boyfriend (uncredited) | 
    
    
      | Beckett Bould | The Murdered Watchman (uncredited) | 
    
    
      | John Boxer | Detective in Pub (uncredited) | 
    
    
      | Michael Corcoran | Sam (uncredited) | 
    
    
      | Arthur Cortez | Jock (uncredited) | 
    
    
      | Dan Cressey | Customs Officer (uncredited) | 
    
    
      | David Davies | Officer on the Dunbar (uncredited) | 
    
    
      | Frank Forsyth | Police Constable Witnessing Robbery (uncredited) | 
    
    
      | Rowena Gregory | Mary (uncredited) | 
    
    
      | Fred Griffiths | Sailor on Barge (uncredited) | 
    
    
      | Pat Hagan | Squad Car Officer (uncredited) | 
    
    
      | Ellis Irving | Superintendent (uncredited) | 
    
    
      | Sam Kydd | 2nd Engineer (uncredited) | 
    
    
      | Howard Lang | Detective Detaining Suspect (uncredited) | 
    
    
      | James Liggat | Bit Part (uncredited) | 
    
    
      | Victor Maddern | First Tram Conductor (uncredited) | 
    
    
      | Jack May | Sailor on the Dunbar (uncredited) | 
    
    
      | George Merritt | Captain of Dunbar (uncredited) | 
    
    
      | Arthur Mullard | Seaman on the Dunbar (uncredited) | 
    
    
      | Laurence Naismith | Commissionaire (uncredited) | 
    
    
      | Paul Rich | Singer in Pub (uncredited) | 
    
    
      | Jack Sharp | Dock Worker (uncredited) | 
    
    
      | Campbell Singer | Station Sgt. (uncredited) | 
    
    
      | George Spence | Pub Patron (uncredited) | 
    
    
      | Ivan Staff | Edward - Speaker at Hyde Park Corner (uncredited) | 
    
    
      | Eric Thompson | Garage Pump Attendant (uncredited) | 
    
    
      | Frederick Treves | Detective at Bank (uncredited) | 
    
    
      | Mavis Villiers | Drinking Club Blonde (uncredited) | 
    
    
      | Michael Ward | Pianist (uncredited) | 
    
    
      | John Warwick | Inspector Jim Moss (uncredited) | 
    
    
      | Russell Waters | Sgt. - River Police (uncredited) | 
    
    
      | Henry Webb | Speaking Extra (uncredited) | 
    
    
      | Meadows White | Alf - Theatre Performer (uncredited) |