The brothers Barrymore do some delightful upstaging of each other in Arsène Lupin, with John as the suave duke whom Lionel as the dogged police inspector suspects of being the thief known as Arsène Lupin. There's some sexy business involving Karen Morley as a socialite who may be more than what she seems, and everything culminates in the theft of the Mona Lisa. It's maybe a little more creaky in its joints than is good for it, in the way of early talkies.