Plot hole: When Melvin receives the phone call from a lost Diana, he is staring at his goldfish, swimming peacefully in the bowl in his apartment. He unsuccessfully attempts to rescue Diana, then goes to the night club where he encounters an inebriated Ginger. He escorts her home, rebuffs her advances, and goes to his own apartment. The next morning, he goes to her job site, where, inexplicably, the goldfish has now taken up residence. Unless Ginger's flunky somehow broke into Mel's apartment and absconded with the fish, there is no way the fish could have gotten there on its own.