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1.
Everytime a plothole is found in the script of the long-running series Dr. Who, the Doctors line reads 'I'll explain later'. Not by a lack of inmagination, but of time conflicts/paradoxes in the Dr. Who universe.

This line is hugely made fun of in the 'Comic relief' parody starring Rowan Atkinson and Hugh Grant.
Doctor: Let's go...
Rose: How come the Daleks are still alive?
Doctor: hazitates I'll explain later...
by casdebom June 01, 2010