Glen Furlblam aka Doctor Three-Brains is a minor antagonist in WordGirl, first introduced as a sort of rival to Dr. Two-Brains before later being reduced to a minor background villain.
He first appears in the episode "Crime Takes a Holiday", when Dr. Two-Brains seeks a replacement villain to take over for him when he goes on a vacation cruise he won from Dairy Villains Monthly. Glen then shows up at the auditions and claims to be Two-Brains' number one fan. He then proceeds to claim he could improve Two-Brains' crimes, much to the villain's annoyance. Because Two-Brains does not feel that Glen is a competent replacement for him, due to his conceitedness and foolish ideas, he rejects Glen's audition.
Angered by not being able to impress his idol, Glen uses his vicious cats to steal Dr. Two-Brains' lab coat and chase the scientist until Two-Brains is stranded on his own goop ray. While the authentic Two-Brains is stuck, Glen begins trying to outdo all of his crimes. In this endeavor he fails rather miserably, though he does not see that. WordGirl eventually apprehends him and Two-Brains gets to go on his vacation.
In the episode "Dr. Three-Brains", Glen's most recent appearance, Glen foils Two-Brains' plans to escape prison by (with quite a bit of luck) managing to steal the real villain's Blackout Ray and his list of things to steal once his freedom was regained. He tries once again to outdo the real doctor's intentions, this time by calling himself Dr. Three-Brains, taping two rubber brains onto his head and trying to "outdo" the crimes on the genuine doctor's list (For example, by placing one strawberry onto the World's Largest Cheesecake to make it "better" before stealing it). With Two-Brains' help, WordGirl again apprehends Glen.
In the episode "Two Brains' Quartet", Glen is among the crowd of villains watching Dr. Two-Brain and his henchman sing in prison, and seems to be jealous of them.
Glen later appears in "A World Without WordGirl" in the alternate reality as Two-Brains' manager at a sandwich shop, but with no dialogue. Now being his boss, he acts more strict with Two Brains and even baits him with cheese to do work. He also makes a brief cameo in "The Rise of Miss Power" where he is tied up with Raul Demiglasse and Seymour Orlando Smooth.
