Episode five of The Americans, which just aired the other day on FX, vaulted this new series to a higher level, with a plot that plays off the real-life attempted assassination of President Ronald Reagan. The show has matured, and quickly, and FX clearly recognizes that fact. Tonight at 10 p.m. ET, the network is presenting a marathon of all five episodes to date – encouraging viewers to catch up, and jump aboard, in one Friday night mini-marathon. I encourage you to do the same thing. Ker