Programme 2 - Extra Videos!
Programme two, Central America, things are really hotting up! Don't forget you can watch both the episodes again on iPlayer for the next two weeks.
This week's exclusive videos, filmed by Mark, are: an extended scene with the border police; getting to grips with some dirty washing - hotel-room style; and the very cute Panama monkeys.
A ride along with the US border patrol opens Mark's eyes to the real danger south of the border.
When you drink 10 litres of water everyday and sweat nearly all of it out then you really need to keep your gear clean. Mark shows us how it's done.
Panama Monkey Business
Mark goes into the jungle to meet some of the locals.
Leave a comment below to let us know what you think of the show so far, or go on twitter and tweet Mark directly, he'll do his best to respond.