Don Draper returns this week, while Raylan Givens says goodbye for another season. "Castle" celebrates 100 episodes and David Tennant trades in the long Doctor Who coat for WWII spy garb. Click through the gallery below to see what to watch and what to avoid on TV April 1-7. Curt Wagner, RedEye's Show Patrol Want more? Discuss this article and others on Show Patrol's Facebook page.
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