Me and my grandmother watch it all the time it is one of our favorite shows. No swearing (just beeps), nothing sexual, no blood and gore, just nothing but good laughs, surprises and things that make you wonder.
Yes the camera doesn't show u the part where he swaps what he's holding for the identical object but one with modifications from under the counter he's standing in front of. But why the @#$% would they? That would ruin the trick? What don't you people understand.
And the reason u don't see the inner workings of the tricks... is because the people he's fooling don't see it either. So it helps immerse you in the experience.
And no they marks not paid actors, they are real people thinking they are signing up for a job or class, or etc., etc. The type of person who thinks the marks are paid actors are the types of people who whine and complain that the Superbowl is fixed. You can't have that many people keep that big a secret u conspiracy theory dumbies.
So do like me and my grandma do and enjoy the darn show :D