Hot Line (US title: The Day the Hot Line Got Hot, French: Le Rouble à deux faces or Le Téléphone rouge) is a 1967 French/Spanish international co-production comedy spy thriller directed by Etienne Périer and starring Robert Taylor in his final feature film and Charles Boyer.^[1] It was released in the US by American International Pictures.

An American and Russian agent find themselves duped by a double agent who works for both of them. Also involved are a naive IBM computer operator and the telephone operator at the hot-line center in Stockholm.

• Charles Boyer as Vostov, KGB head
• Robert Taylor as Anderson, CIA chief
• George Chakiris as Eric Ericson, Computer Expert with IBM
• Marie Dubois as Natasha
• Gérard Tichy as Truman
• Marta Grau as Old Lady
• Irene D'Astrea as Old Lady
• Josefina Tapias as Old Lady
• Maurice de Canonge as Director of Hotel
• Gustavo Re as Police Chief
• Ilya Salkind as himself

• Blake, Matt; Deal, David (2004). The Eurospy Guide. Baltimore: Luminary Press. ISBN 1-887664-52-1.

• The Day the Hot Line Got Hot at IMDb
• Le rouble à deux faces at the British Film Institute^{[better source needed]}