Yul Brynner is "The Double Man" in this 1967 spy film also starring Britt Ekland, Clive Revill, Moira Lister, and Lloyd Nolan.
Brynner is Dan Slater, a CIA agent who travels to Austria after the death of his teenage son in a skiing accident. It's been written off as an accident, but Slater isn't convinced. He asks a former undercover agent (Clive Revill) for help, but ends up doing most of the investigating himself and soon realizes that this was no accident. But to what end? Slater stays in Austria hoping to figure out what the plan is, and who has initiated it and why. He eventually meets Gina (Ekland) after several attempts at meeting her on the slopes. Gina had seen his son on the lift.
The plot is soon revealed, leading to a dangerous confrontation.
Pretty good, with an excellent performance by Brynner as a cold, hard man who shows no emotion and perhaps feels none. Also, the scenery is gorgeous, as is Britt Ekland, at the height of her beauty here.
Someone here mentioned that the glossy spoofs are better remembered today, and perhaps that poster is correct. However, I don't think there's too much remarkable here. It's a serviceable film with a very intrusive music score.
See it for Brynner's performance.