By John Keegan and Gregg Wright
"Body swapping episode". The mere thought of the concept sends shivers down my spine. And these are not shivers of excitement, but of dread. Often, I wonder if there's been some sort of edict set down by the gods of television, decreeing that all sci-fi shows must, at some point, do a body-swap episode. It's one of the most popularly-utilized tropes in sci-fi television, but not only am I sick and tired of it, I'm not convinced that it ever really worked. Maybe there are rare exceptions were uncannily good acting results in a truly convincing body-swap, but in almost every case, it's impossible to see the exercise as anything other than the actors mimicking each other, to the best of their abilities. Suspension of disbelief just isn't there.