Bobby asks the Black As boys to get his tractor from a distant outstation. He has a wheel off it, so they'll need to get that there as well. After a hostile reaction from Oppy they lend a tiny dinghy to tow the wheel by sea.

The boys manage to get the wheel to the barge ramp and construct a raft out of junk to float the wheel behind the inflatable dinghy. They take to the ocean with the tiny engine straining under the load.

Out at sea Chico accidently spears the inflatable dinghy and it sinks. The boys pile onto the raft, head for the shore and make camp. With no phone, no water and no food the boys face a real challenge.

Stranded without food or water the boys push the tractor wheel towards the outstation...and tractor. Miraculously they find a spring and eventually reach the outstation.

With a charged battery and some brutal bush mechanics the tractor sparks up and is loaded with handy items and an old broken postie motorbike. The boys pile on and take off only to be halted by a massive brown river.

Out on the massive clay pan the boys are feeling the heat. They decide to make a shade roof out of palm leaves and a sled to tow behind. With their new roof and makeshift sled they head off once again.

Chico and Dino ride behind the tractor but court disaster when it's torn to bits in a gully. Once again crowded onto the tractor, they are stopped by a croc-infested billabong. Joe sparks up the postie to test the depth.

The boys are forced inland then reach the head of the river. They find a spot to cross, but its deep and full of crocs. They nearly tip over but make it through and are nearing home only to be confronted by their nemesis.

Nearly home and the tractor runs out of fuel. After trying to tow it with the postie bike the boys pile onto the bike to look for help. Some women tow them into town but Bobby isn't impressed when they finally arrive home.