Thieves Fall Out is a 1941 American comedy film directed by Ray Enright and starring Eddie Albert and Joan Leslie, with Jane Darwell, Alan Hale, Sr., William T. Orr, and John Litel in support.

Lacking the financial means to marry, and fearing that Mary will leave him for a rich, annoying, and disrespectful rival, Eddie implores his father for a pay raise, but is denied.

To minimize the risk involved (in laying out cash against a future payout) the broker he approaches insists Eddie be married and a father before committing to the deal.

Following the advice of his spunky, congenitally buttinsky maternal Grandmother to act like his impetuous and successful Grandfather, Eddie sweeps Mary off her feet, elopes with her, and in spite of objections from her parents to all aspects of it, the couple moves in with Mr. and Mrs. Barnes.

The previous owner had made a bad deal on a large government contract (patriotically offering to manufacture a custom spring at his cost, without making a profit).

Obviously he does not have that kind of money himself, and trying to explain it all - and get help from both sets of parents while confessing that not only is he faced with paying $108,000 in all for his $100,000 legacy but has put his mother's life in the hands of dangerous gangsters - will not go over well.

Collins and his top henchman make a surprise appearance at the Barnes home to force the issue, where it readily comes out that Eddie had ulterior motives - no matter the purity of his heart - in proposing to Mary and plunging towards parenthood.

Grandma proposes to Eddie that she fake an accident in front of Collins' car, let him believe he killed the right woman, and use the ploy reveal his duplicitous hand to the law.