Piranha is the first episode of the first season, as well as being the first episode in general. The episode originally aired on 5 April 2009 while the unhooked version aired on 5 May 2010.
"In 1976, a packed coach crashed into the Amazon river killing 39 people. By the time the bodies were pulled out by rescuers, some had been so viciously mutilated by piranha they could only be identified by their clothes. Tracking down survivors and eyewitnesses of piranha attacks, Jeremy Wade reveals why the piranha fills our nightmares."
Jeremy Wade journeys to the heart of Brazil, following reports in which a bus crashes into the Amazon River, and all the passengers were eaten alive by a pack of red-bellied piranhas. He investigates this and other stories in order to determine if the piranha truly deserve its reputation and what exactly triggers a feeding frenzy.
During his trip to remote regions of the Amazon river basin, he finds out that the bloodthirsty piranha is just as predator as prey. Finally he hears a chilling story about a child fallen into the river and after a few seconds, only the skeleton was found.
He finally uncovers the truth that piranhas really can be dangerous to humans, but usually in the dry season when other food is scarce.
- Amazon River Dolphin
- Black-Tailed Payara (Minor Appearance)
- Red-Bellied Piranha
- Redeye Piranha (Minor Appearance)
- Ripsaw Catfish (Minor Appearance)
- Amazon River
- Amazon Basin
- Amazon River
- Victim/s: 40 Passengers
- Death/Injuries: 39 Died
- Survivor/s: 1 Survivor
- Date/Location: November 14th 1976 / Amazon River