In this episode of Trekking Through Time and Space...

Hoai-Tran and Jacob have a grand reunion with the one and only Mr. Spock as "Unification II" finally delivers time with the iconic Vulcan himself on Star Trek: The Next Generation. And over on Doctor Who, they're up to their neck in "Dark Water" with a grim but intriguing set-up for the eighth season finale.

• Doctor Who: Dark Water - 1:39

• Star Trek: The Next Generation: Unification II - 35:07

• Episode Rankings - 1:05:03

Logo by David Scaliatine.

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