In addition, it depends on where you are. In the eastern US I can only think of the 100 mile wilderness where you’d be more than 2 days away from civilization. Unless you’re so injured you can’t walk or are snowed in, in which case you wouldn’t be able to find food anyway even if you knew where to look.
The “Man vs Wild” episode did have a disclaimer, that Bear and his team get help if they are really at risk, that they are out to challenges for entertainment, and to consult a professional prior to trying any of it. To paraphrase.
It runs on Monday night at 9pm Central.
This is what we learned in Scouts. Set up camp, cover water, shelter, fire, food, and signals for help, and wait.
Deal first with whatever is going to kill or injure you first, and work on rescue when you are out of immediate danger.
Usually it would prioritize as urgent medical, environmental, water, signals, food, but would vary on the circumstances.
Where Grylls’ show fails entirely as a survivior exercise is that he goes out of his way to make things worse by courting death or injury rather that mitigating risk.
It is a fun outdoor adventure show masquerading as a survivor show, along the lines of a vid titled “Firearms Safety” turning out to be Bubba shouting “Hey, fellers, watch this!” as he lights a firework and stuffs it up his ass.
I did much enjoy the naked calisthenics on an ice field in Patagonia 
- though why he didn’t just freeze to death right on camera, exercise or no, is a mystery. He’s also gone skinny-dipping in Siberia in -40 degree weather. I don’t know what kind of clothes he wears that get warm and dry almost in minutes. Fall in a stream in even moderately cool weather, and hypothermia is sure to follow.