Dr. Cushing Catheter is a major antagonist in Gremlins 2: The New Batch.
He was portrayed by the late Sir Christopher Lee, who also played Frankenstein's Monster in The Curse of Frankenstein, Count Dracula in Hammer Studios' Dracula films, Lord Summerisle in The Wicker Man, Francisco Scaramanga in The Man With the Golden Gun, King Haggard in The Last Unicorn, Fu Manchu in Hammer's Fu Manchu film series, Saruman in Sir Peter Jackson's The Lord of the Rings and The Hobbit film trilogies, and Count Dooku in the Star Wars prequel films.
Dr. Catheter is an animal biologist and chemistry researcher who works with animals to find advances in technology and medicine. He works at a laboratory called the "Splice O' Life" which is at the skyscraper building "Clamp Center". He is working on trying to find cures for illnesses such as rabies and the flu. He was planning to dissect [which means kill in order to study and learn about] Gizmo, (one of the main protagonists of the film, who is a cute little Mogwai) who was defenseless and too weak to escape from Dr. Catheter and his henchmen assistants Martin and Lewis. Gizmo's only chance he had to attempt to run away was when dancing to music, but was captured by Dr. Catheter and put back in the cage. Billy Peltzer managed to rescue Gizmo and tried to make him keep quiet.
Later on, Gremlins were destroying the Clamp Centre building. They were drinking his potions, and became mutated, one became the Vegetable Gremlin, one became the Bat Gremlin, Mohawk turning into a gremlin/spider hybrid, a gremlin turning into electricity, one gremlin turns into a female (named Greta), another gremlin's face is horribly disfigured by acid, and most importantly, the Brain Gremlin. The Brain Gremlin, after drinking a brain enhancing hormone serum that changed him from a primitive monster into a highly intelligent creature whose levels of intelligence matched the maximum potential of a human being. He later tells Dr. Catheter details about his own monster species.
The Brain Gremlin then injected genetic sunblock into a gremlin who turned into a gremlin and bat hybrid, ordering him to fly out into the daylight and tell the other monsters when they are able to come out. Dr. Catheter ordered his assistants to catch the Bat Gremlin, but fail and it escapes. Dr. Catheter announces, "The horror! The horror! Things... stuff!", and exclaims to Billy Peltzer that he has developed a fear of animals, yelling, "I swear to god young man. I will NEVER hurt anything ever again! There are some things that man is not meant to splice.".
He teams up with Billy Peltzer (who rescued Gizmo from him formerly) with another man named Forster. However, a gremlin bites Dr. Catheter on the hand, and after Billy throws it away, the Electrical Gremlin pops out of a lightbulb and electrocutes Dr. Catheter to death.
- Cushing's first name is revealed in David Bischoff's novelization and is a reference to Christopher Lee's frequent co-star Peter Cushing.