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“CASTLE,” 9 p.m., KMGH-Channel 7: The Season 3 finale, “Knockout,” finds the team uncovering a deep conspiracy. The real mystery here is, why is this formulaic “Murder, He Wrote” so popular?
ALSO
“The Event,” 8 p.m., KUSA-Channel 9: President Martinez returns to the White House. This episode is titled “The Beginning of the End,” which may speak for the series as a whole.
Joanne Ostrow
