Duty Free S3E5 (Costa Del Crime)

A mix-up lands David with a tartan hold-all identical to his own--except that it contains bundles of bank notes. He gives it to Linda to hide, and when Robert finds it, he assumes that David and Linda are planning to try to elope again. Meanwhile, two sinister men arrive at the Pearces room: they want their bag back and they aren't above throwing David off the balcony if he doesn't disclose its whereabouts. Fortunately, Amy has done the right thing and handed the bag in to the police, but David has kept some notes back for himself. Suddenly it's raining money.