When diehard American movie fans speak of Jack Lambert, they are generally not referring to the British character actor of that name, but of the New York-born supporting player who was most often seen in gangster roles. Following Broadway experience, Lambert came to Hollywood in 1943, to menace Kay Kyser in the MGM musical comedy Swing Fever. Usually a secondary bad guy, Lambert was the main menace -- a scarfaced thug with a hook for a hand -- in Dick Tracy's Dilemma (1947). A less malevolent Jack Lambert was seen on a weekly basis as Joshua on the 1959-60 TV adventure series Riverboat. ~ Hal Erickson, All Movie Guide