"Alias" (8 p.m., ABC)

"Alias" (8 p.m., ABC): Fans of "Alias" have a lot of questions on their minds as the spy thriller launches its new season, like "Can a pregnant Sydney still kick bad-guy butt?" and "Will Vaughn survive that ghastly car accident?" The good news is that we finally seem to be done with that mind boggling Rambaldi mystery.
"Night Stalker" (9 p.m., ABC): "Night Stalker" returns from the grave. The original "Kolchak: The Night Stalker" aired for a single season in the 1970s, yet gained a cult following. Now Carl Kolchak is back, with Stuart Townsend starring as the haunted crime reporter whose wife was killed 18 months ago in an otherworldly fashion and who now bears suspicion from the FBI for murdering her. Naturally Kolchak is obsessed with uncovering what really happened, and with solving the subsequent ghoulish crimes that constitute what he sees as a pattern.
"The Sixties: The Years That Shaped a Generation" (9 p.m., PBS): Starting with Bob Dylan on Monday, PBS has been focused on the '60s all week. This documentary uses archival materials and interviews to recall "an era full of great hope and turmoil." Topics include the civil rights and women's liberation movements, the youth counterculture, and the Vietnam War.