sentences:  Within weeks, at age 56, Ryen obtained the role which resulted in his best remembered performance, that of Colonel Heinze in "Casablanca" (1942), where he constantly had to tail his superior Major Heinrich Strasser (Conrad Veidt).His scenes took four week to shoot and, at $400 a week, he earned $1,600.After "Casablanca", Ryen appeared in 16 more films.