“Jericho,” the doomsday drama fans brought back from the dead, returns on Tuesday (10 p.m., CBS). The second season runs seven episodes instead of 22, but that’s seven precious hours of scripted TV during the winter of the writers’ strike. Producers had planned three storylines — one in New York City — but have now compressed the tale and dropped much of the soap-opera elements. It should move fast. Executive producer Carol Barbee promises viewers will learn more about the mysterious terrorist group that launched the attack, and get a clearer picture of what’s left of the United States outside Jericho.

Last season was about the aftermath of a nuclear attack in our small little town. Season 2 is about the country and saving a system of government and a way of life. It’s about occupation, resistance and then revolution.