Go to the Discovery Channel website and if you have high speed you can watch the episodes online that's what I did with the first episode.
As for water and guns,
It is LOS ANGELES. I know the area they are in, I worked it a couple years ago. It is EAST L.A., the river you see is the DEEP PART! <And yes it is THAT EAST L.A.> Sea water, well, the ocean is a good dozen or more miles away, and I honestly don't see them hauling their little cart through downtown L.A. to the beach and back. It would be funny to see the cast try it, the whinning and crying that would emit forth, but also seeing them trying to negotiate the congestion of L.A. and then some not so nice neighborhoods.
As for guns, well it is Los Angeles, they now are having people show ID for ammo purchases and firearms sheesh! Forget it!