A nice PBS NOVA episode called "Parallel Worlds, Parallel Lives" talks about the life of Hugh Everett III (presented by his own son, musician Mark Everett).
Everett was the creator of the many-worlds interpretation (MWI) of quantum mechanics, a multiverse (parallel universes) theory.
The show does a great job explaining the quantum physics paradoxes that lead to the theory, although it could have been clearer about its drawbacks, especially its bizarre implications to probability theory.
The demonstrations of the duality of matter experiment and of the Schrödinger's cat thought experiment were well done. Multiverses stories are very popular in sci-fi shows, such as in the Star Trek episode "Mirror, Mirror."
The NOVA episode can be watched online (divided in parts) on YouTube. Here's the preview: