The headline says it all. One question, though: what the heck is EPIX? Or more to the point, what channel is it? The first episode of the behind-the-scenes look at the Kings and the San Jose Sharks as they prepare for the Stadium Series game Feb. 21 in Santa Clara airs tonight at 7 p.m. If you don’t have EPIX, then you can watch a live stream of it at NHL.com for free. The Kings’ and Sharks’ websites also will stream it, as will EPIX.com. Tonight’s episode is the first of four.