In Pictures: The Boys tackle the Ultimate Team Challenge

The four OGs have been battling it out since day 1, but they had one more mountain to climb - The Ultimate Team Challenge. The Boys gave it their all through mental and physical rounds under the heat of the South African sun, before climbing the pyramid to hit that final buzzer. Take a look at the action as David, James, Tristan and Warren fought for the title.

The Boys set off - and the determination was clear

Warren and David check their balls for the codes

David makes light work of the maze puzzle

And the Boys head onto the next puzzle under the sweltering sun

Tristan keeps his cool as he takes aim

The rope puzzle left them in a bit of a tangle, but they soon had it unwrapped

The Boys displayed their nimble footwork as they untied the ropes

Almost there...

...and onto the final climb

One last scramble for victory

And the smoke signals the finish! We could hear the savannah shaking as the Boys roared with relief

Laura declared the Challenge over - but the Boys faced an agonising wait to find out if it was enough to win the series...