
Howard, didn't you say
you worked on the Mars rover?
The Big Bang Theory Season 2, Episode 8

I was afraid you were going to fixate
on that Mars Rover incident.
The Big Bang Theory Season 4, Episode 7

...just outside Bakersfield.
Where do you think? On Mars.
The Big Bang Theory Season 2, Episode 8

On Mars?
The Big Bang Theory Season 11, Episode 17

You said that if I went out with you
I could drive a car on Mars.
The Big Bang Theory Season 2, Episode 8