Repairanoid is the third part of the 32nd episode of season 2 in Dexter's Laboratory. It originally aired on March 25, 1998. In this episode, Mom calls for an electrician who comes to fix a blown-out fuse. He accidentally stumbles into Dexter's laboratory, and causes the electricity bill to skyrocket.
Mom plugs in a toaster and notices electricity flying from around the plug. She then goes to call the electrician. Meanwhile, Dexter is in his lab working on another one of his inventions, and is interrupted by flickering lights. He calls for a yellow alert, and looks at Computer's monitor to find a rotund man looking at the house's fuse box. Dexter then sends a fly bot to the fuse box. Arnie crushes the bot by clapping his hands together. Dexter assumes that Arnie was sent by Mandark to foil his plans. Computer tells him that there is no match, and Dexter runs to Mom to tell her about Arnie.
Later, Arnie is in the garage looking at the wires, and he sees one named "Exhaust." He follows the cord all the way to Dexter's laboratory where he is stunned by the overuse of electricity. Dexter pops out of a metal toaster and sees Arnie working on one of his machines. Computer reads maximum efficiency on the sub-particle accelerator. Dexter, surprised by this, lets Arnie continue working on the lab while he takes a rest. Dexter looks as all of his machines are at maximum power.
After a while, Arnie takes the bill to Mom and she is shocked by how much it cost. She then proceeds to pay Arnie in pennies.
Running gag: When Mom calls for someone to fix something, Dad shows up eager to do it for her, only for Mom to turn him down each time.
Although Dad appears in this episode, he does not have any dialogue.
When Dexter's Mom says she should've had her husband fix everything after seeing the $40,000 bill. Dexter's Dad appears and she says to him: "No honey not you..." this should be an error as Dad and Mom are sort of married, or a theory could be that Mom and Dad's marriage was annulled and she's married to someone else. Another theory suggests that Dad might not be Dexter's biological father, but that's sketchy.