What's On Tonight: Survivor: One World, NOVA, Revenge

Survivor: One World, 8 p.m., CBS

It is hard to believe that anyone would choose to keep Tarzan or Alicia over anyone else but I guess that decision makes this group’s “eye-on-the-prize” clarity that much more, well, clear. They are playing with their heads, not their hearts, and are making genius plays week after week lately. Tonight, the weepy ‘messages from home.’

NOVA, 9 p.m., PBS (check listings)

Tonight, “Why Ships Sink.” These seem obvious to me. “Reconstructing the events leading up to cruise disasters, including the Costa Concordia, the MS Sea Diamond and the MTS Oceanos.”

Revenge, 10 p.m., ABC
I watched the hour-long recap episode last week and I am completely hooked. Of course, I may only like the Cliffs Notes version, but I am tuning in. Nice work, ABC! A mid-season grab!