Johnny Flanagan did not have the privileges of a good education or wealthy background but the streets developed his natural talent to be a great fighter. His enormous potential to reach the top is born out of a string of spectacular successes. All of which is brought to a halt when he develops a physical relationship with his manager's wife, the beautiful but manipulative Lorna. His naive temperament is no match for her callous, dispassionate scheming and he unwittingly becomes a pawn in Lorna's ultimate plan... .to murder her husband.
Unfortunately the movie The Flanagan Boy is not yet available on Disney Plus.
| Directing | Reginald Le Borg | Director |
| Writing | Max Catto | Novel |
| Writing | Guy Elmes | Screenplay |
| Writing | Richard H. Landau | Screenplay |
| Costume & Make-Up | Nina Broe | Hairstylist |
| Sound | Ivor Slaney | Original Music Composer |
| Sound | Ivor Slaney | Conductor |
| Camera | Walter J. Harvey | Director of Photography |
| Art | C. Wilfred Arnold | Art Direction |
| Sound | Bill Salter | Sound Recordist |
| Camera | Len Harris | Camera Operator |
| Directing | Jimmy Sangster | Assistant Director |
| Production | John 'Pinky' Green | Production Manager |
| Directing | Renée Glynne | Continuity |
| Costume & Make-Up | Philip Leakey | Makeup Artist |
| Production | Anthony Hinds | Producer |
| Editing | James Needs | Editor |