Welcome to Star Talk.

Your place in the universe where science and pop culture collide.

Star Talk begins right now.

Welcome to the whole of the universe of the American Museum of Natural Screen.

I'm your host of Star Talk, Neil deGrasse Tyson, your personal astrophysicist.

And tonight we're going to be talking about the science and fantasy of time travel

and because we're featuring my interview with Christopher Lloyd,

who played Doc Brown on Back to the Future.

Not only that, I've got my interview with Michelle Gomez,

who's a lead actress in the BBC cult series, Dr. Who.

So, let's do this.

Yes.

Alright.

I love bringing in help to talk about this.

Chuck, my co-host tonight, Community Co-host, thanks for joining me.

Of course, always pleasure to be here, Neil.

And I've also got a good friend and colleague, Professor Michio Kaku,

who is a professor of theoretical physics at the City University of New York.

So, Michio Kaku, thanks for being on Star Talk.

Glad to be on your show.

Now, I've got you on here because you're an expert on so many things

that transcend ordinary thought.

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