Felicity is back — as a spy!

EntertainmentThe Americans, the new cold war-era spy drama that premieres tonight at 10 p.m. on FX, has a juicy premise: It is 1981, and Philip and Elizabeth Jennings (Matthew Rhys and Keri Russell) are a seemingly hum-drum couple living outside of Washington, D.C. with two kids, a station wagon, a nice house and a picket fence. Unbeknownst to all, even their children, are their true identities as Russian sleeper agents, trained to live as Americans and unearth government secrets. It’s …