Sure, they are a bit of TV hokey..but some tips can be gained..
Some, such as the two British Spec Ops veterans are not exciting, but they have some good knowledge to share.
Then there is the "ALONE" series, which is mostly located in the pacific northwest, and IMO seems to reflect a bit
closer to what a true survival situation may be like.
In other words, with a downed plane, a wrecked boat or even a broken snow machine or ATV, where you may be left with clothes and some basic survival equipment, and perhaps with a boat, plane or snow machine you cannibalize.
The most ridiculous one would be the "naked and afraid" series. I cannot feature a scenario, where one would be left completely unclothed...especially where you would be naked, but still have a knife, tarp and a cook pot.
I think the "naked'"scenario is just a way to arouse some prurient interest....