O'Shea's Big Adventure

Mark investigates the threats faced by the venomous Broad-headed snake, one of Australias most endangered snake species.

Mark sets out to investigate stories about a massive, threatening snake. There's no cobras in the area, so what could it be?

Mark hunts Western Australia for a rare find: a pair of Rough-scaled pythons (Morelia carinata)!

A species of lizard in Papua New Guinea has evolved to have green blood. But what could have triggered this odd mutation?

Mark hunts for deadly venomous snakes in Papua New Guinea to extract their venom and advance bite treatment.

Mark journeys to New Caledonia where a remote set of islands are home to the largest living geckos in the world!

During WWII, US soldiers accidentally introduced snakes to tiny island of Guam. Mark investigates how this has impacted the local flightless birds.

Mark joins a seasnake specialist as they try to bag some of the deadliest seasnakes in the world to develop antivenom.

Chappell Island tigersnakes are the largest tigersnakes in the world and have extremely unusual eating habits. Mark investigates.

Mark goes to South East Asia to find flying lizards!

Fewer than 3,000 Komodo dragons exist in the world. Mark goes to Indonesia to investigate the challenge of saving this species from extinction.

Mark goes to the Krakatau islands and explores the unique challenge facing scientists to recolonise the islands wildlife after an eruption and tsunami left it on the brink.