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Tonight on TV

Revenge of the Whale (7 p.m., Ch. 5): Fascinating two-hour documentary about the real-life events that inspired "Moby Dick" — the 1820 sinking of the whaleship Essex by a whale and the horrors endured by the survivors — including cannibalism.

That's Life (8 p.m., Ch. 2): Lydia gets a big scare at the doctor's office. (Repeat)

Encounters With the Unexplained (8 p.m., Ch. 16): The second-season premiere of this low-budget, rather questionable series features reports on "the truth" behind Butch Cassidy and the Sundance Kid and Pearl Harbor.

All Souls (8 p.m,. Ch. 24): A young patient sees death before it happens.

Downtown (9 p.m., Ch. 4): Parents who want to clone the baby they lost.

Nightline (10:35 p.m., Ch. 4): The news show begins a week's worth of reports on the ongoing war in the Congo and how what has been called "the first African World War" has been under-reported in the West.