The Man Called Flintstone (1966)

When secret agent Rock Slag is sidelined in a Bedrock pursuit, his chief taps Fred Flintstone as a stand-in, thanks to their uncanny resemblance. Fred’s unexpected journey whisks him away to glamorous Paris and Rome, much to the delight of Wilma, Barney, and Betty. However, Fred must navigate the treacherous schemes of the enigmatic Green Goose, who is plotting to unleash a devastating missile. Juggling his secret identity while keeping his loved ones in the dark becomes a challenge as Fred strives to thwart villainy and save the day.