Dexter Colt is the main antagonist of the 2003 The Simpsons episode,"The Dad Who Knew Too Little".
He is a private detective hired by Homer to spy on Lisa and report his discoveries so Homer could appear to know facts about her life. However, Colt charges Homer $1000 for expanses, including a $40 steak, which would've been free had Colt eaten all of it, as well as silver bullets, because Colt initially suspected Lisa of being a werewolf. When Homer refuses to pay, Colt frames Lisa of stealing all the animals of the Screaming Monkey Medical Research Center. However, he was arrested for the crime after Lisa temporarily blinded him with a laser pointer given by Bart.
However, Dexter was released from jail and allowed to return to his PI practice. Monty Burns eventually hired him to follow his ex-fiancée, Lyla. When he asks for his fee, Burns tries to drop him through a trap door, but accidentally drops himself.
Colt made a cameo appearance in The Simpsons Movie as part of the mob after the town is trapped inside a dome under the orders of Russ Cargill and the President.
- He was voiced by Hank Azaria, who also voiced other The Simpsons characters like Moe and Frank Grimes, Jr..