Doc Hopper is a character from the Muppet Movie. He has plans to open a big chain of frog's legs restaurants, and wants Kermit as his mascot. However, Kermit has plans for Hollywood. Hopper pursues Kermit and co. across the country, ending in a showdown in which Doc Hopper and his goons are driven off by an enlarged Animal. In A Very Merry Muppet Christmas, a Doc Hopper restaurant appears when Kermit goes to the world in which he was never born. The Muppet Movie is the first of a series of popular live-action musical feature films starring Jim Hensons Muppets. ...
Almost immediately, he is pursued by the conniving DocHopper (Charles Durning), owner of a struggling french-fried frog legs restaurant franchise who has set his sights on Kermit as a potential new mascot.
After Kermit and friends manage to evade DocHopper's schemes a number of times (adding several more Muppet characters to the group as they progress from scene to scene), DocHopper responds by capturing Miss Piggy in order to lure Kermit into his clutches.
Kermit is very nearly lobotomized by a mad scientist's (Mel Brooks) electronic cerebrectomy device, intended to brainwash him into performing in DocHopper's TV commercials, until Miss Piggy manages a last-minute rescue with some flbelt karate maneuvers.