Desc: The Return of the Rat: Directed by Graham Cutts. With Ivor Novello, Isabel Jeans, Mabel Poulton, Gordon Harker. Rich, amoral Zelie is married to Pierre Boucheron, "The Rat," but her interest in another man is an open secret. Forced to defend his honor, the Rat takes refuge in his old domain of the Paris underworld. But even here he has a rival--and when murder is afoot, the sinister Morel's ambition threatens to cost the Rat dearly..