Tuesday on TV: Are you ready to enter the "Doomsday Castle"?

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In the premiere of Doomsday Castle (8 p.m., National Geographic Channel), a rich guy and his adult children prepare for the apocalypse by building a castle. Really.They take themselves very seriously. Which makes it very easy for viewers to take them considerably less than seriously.Elsewhere on TV ...So You Think You Can Dance (7 p.m., Fox/Ch. 13): The remaining 10 contestants perform; two are eliminated.Whose Line Is It Anyway? (7 p.m., CW/Ch. 30): Guests include Heather Anne Campbell and Lisa Leslie.Rizzoli & Isles (7 and 9 p.m. TNT): Frankie Jr. is brought in to help with a murder case.America's Got Talent (8 p.m., NBC/Ch. 5): A dozen acts perform in New York..Capture (8 p.m., CW/Ch. 30): One team is given an advantage.Perception (8 and 10 p.m., TNT): Pierce investigates a stabbing at a psychiatric hospital.Pretty Little Liars (9 p.m., ABC Family): Emily moves into Ali's old room.Twisted (10 p.m., ABC Family): Regina's mother wants to have Danny expelled.Who Do You Think You Are? (10 p.m., TLC): Zooey Deschanel learns about her family history.Covert Affairs (10 p.m., USA): Annie is sent to Vienna.Suits (11 p.m., USA): Harvey and Stephen work on Ava's case.