Gladiators - S1 E1

2. Wild Coast

Go up against Australia's wiliest gladiators and their arsenals, from a kangaroo's deadly boxing moves to the redback spider's precision-engineered traps.

3. Judge River

Young gladiators earn their stripes in dense tropical forests. Stand back as a poison dart frog launches a toxic barrage and observe a jaguar-caiman turf war.

4. Tidelands

Head to America's far north for a peek at its waterway's fighters, as a spring thaw pits eagles against herons and dragonfly nymphs against venomous water bugs.