On TV, he is known for playing Michael "Mike" Fulton, an elementary schoolteacher, on the NBC series Punky Brewster and Mylo Williams on the Disney Channel series Good Morning, Miss Bliss. Carter is also well known for playing the role of drug addicted Gary McCullough in the HBO miniseries The Corner, a performance that The Boston Globe said "perfectly captures the gentleness and passivity that can be addiction's easiest conquest".[3][4] Carter's first starring role on television was on Just Our Luck.[5]
On June 13, 1990, Carter was arrested after refusing to answer police officers' questions and babbling incoherently. He resisted arrest and was tased three times.[8] In December 1991, Carter was arrested after assaulting a woman and then stealing her car.[9]