An episode of which classic TV series saw its main character concoct an original "Man from Space" costume for a costume contest at the Raccoon Lodge, only to lose when his best friend rushes in from work in his work uniform and equipment, and wins the contest, mistakenly as a man from space, despite his original plan to dress as Pierre Francois de Brioschi - the man who (allegedly) designed the Paris sewers.
The Honeymooners