Who Is Number One?
- Gads: 1917
- Valsts: United States of America
- Žanrs: Mystery
- Studija: Paramount Pictures
- Atslēgvārds: movie serial
- Direktors: William Bertram
- Lomās: Kathleen Clifford, Cullen Landis, Gordon Sackville, Neil Hardin, Bruce Smith, Ethel Ritchie
