A ruthless gangster named Don is killed during a scuffle with the police. Since only DSP D'Silva knows of this incident, he recruits Vijay, who is a spitting image of Don, to replace the original Don and infiltrate his gang. D'Silva plans to nab the entire gang, but when he dies during a raid, the secret that Vijay is not Don is also buried with him.
Amitabh Bachchan
as Don / Vijay
Zeenat Aman
as Roma
Pran Sikand
as Jasjit (J.J.)
Iftekhar
as DSP D'Silva
Om Shivpuri
as Interpol Officer R.K. Malik
Satyendra Kapoor
as Inspector S. Verma
Kamal Kapoor
as Narang
Helen
as Kamini
M. B. Shetty
as Shakaal
Mac Mohan
as Mac
P. Jairaj
as Dayal (Judo Karate Instructor)
Arpana Choudhary
as Anita
