Looks like a Charge Ti, XTi or TTi I'd say.
The funny thing is that as much as they rant about us stupid Americans, it is funny that he would be using a Leatherman and not something from another part of the world. LOL just sayin'
In the vietnam episode im sure hampster used a wave or a charge on the train to fix the picture one of them did im sure love TG watched it for years, not sure about the U.S version yet, probably to used to our version too much,
If you can, check out the Australian Top Gear. It is much more relaxed/funny than the US version and in one episode , of the earlier seasons, they actually used a Wenger Giant Swiss Army knife to cut a tow strap.
I love Top Gear it is as of right now my favorite TV show. It is much better than the US version of the show. The three presenters just work great together.