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The Big Bang Theory on CBS has been on the air for 10 seasons, and it’s about to get a big jolt of lightening in the form of its latest guest star. Christopher Lloyd will appear on The Big Bang Theory this December. The Back to the Future star won three Emmys for his role on the comedy Taxi, so this will be quite a treat for television viewers. Christopher will join the cast of The Big Bang Theory that includes Jim Parsons, Kaley Cuoco, and Johnny Galecki.

Unfortunately, Christopher Lloyd’s character on Big Bang Theory or the story of the episode are being kept under wraps, but we’re sure it will be hilarious.

Regardless, creator Chuck Lorre and his team that includes Billy Prady and showrunner Steve Molaro are very excited. The three of them made a joint statement to the Hollywood Reporter about Lloyd’s role.

The Hollywood Reporter has the theory that Christopher Lloyd might be playing a character’s father. Like maybe Howard’s.

We don’t know if that’s a real possibility, but we will definitely be watching The Big Bang Theory in December to find out!