Each week on Slate's TV Club Insider podcast, the creators, cast, and crew of The Americans reveal behind-the-scenes details about the making of the FX drama's third season.  In this installment about the fifth episode, “Salang Pass,” Matthew Rhys, who stars as Russian spy Phillip Jennings, joins script coordinator Molly Nussbaum and executive producers Joel Fields and Joe Weisberg to discuss KGB sex training, selecting the perfect wig, and the craziness of playing five characters in a single episode.    Note: This podcast contains spoilers and is meant to be enjoyed after you watch the episode.