episodes; Kari Byron, Tory Belleci and welder Scottie Chapman appeared in the second season. In the third season, Chapman was replaced by Grant Imahara, a robot builder and model maker. Kari Byron Kari Byron was a co-host until 2014 with fellow co-hosts of the "Build Team," Tory Belleci and Grant Imahara. She and the others also hosted their own segments. She became involved in the show after persistently showing up at Hyneman's M5 Industries workshop in a desire to get hired by his company. She and the other Build Team members were given a more prominent role beginning with the show's second season. Not having had a long history in show business, Byron at first found it difficult to act naturally with this more visible position but gradually became more accustomed to it. During the second half of the 2009 season, Byron was on maternity leave and was temporarily replaced by Jessi Combs. In 2010–2011, Byron had her own show, Head Rush, on the Science Channel, geared towards science education and teens. Byron has also hosted the 2010 and 2011 editions of Large, Dangerous Rocket Ships for the Science Channel. She and Belleci made a guest appearance on the October 3, 2012 episode of the Discovery series Sons of Guns. They test fired some of the weapons in the Red Jacket shop and watched as the staff retested a myth previously busted by the Build Team: that a propane tank could explode if struck by a bullet. On August 21, 2014, it was announced that Byron, along with co-stars Grant Imahara and Tory Belleci, would be leaving MythBusters. Tory Belleci Tory Belleci is often considered by fellow MythBusters Kari Byron and Grant Imahara to be more of a daredevil and, as such, often performs the more dangerous stunts when testing a myth. These have included: testing the "Red Flag to a Bull" myth; testing the myth that a human's tongue will instantly stick to a frozen pole, in the "Frozen Tongue" myth; and the "Underwater Blow Dart" myth. One of his more popular stunts, shown several times on the show, was an attempt to jump over a toy wagon on a bicycle; the attempt failed, resulting in Belleci flipping forward, landing on his face and skidding across the pavement, only to immediately respond with an "I'm okay". As a result of doing these stunts, he is often involved in comical