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

You started by asking if I was from Mars
because my ass was out of this world.
The Big Bang Theory Season 2, Episode 8

Okay, while we're waiting for the ball to arrive,
here's some fun facts about Mars.
The Big Bang Theory Season 8, Episode 3

...of the Mars rover's malfunction.
The Big Bang Theory Season 2, Episode 8

...a working prototype of the Mars Rover.
The Big Bang Theory Season 8, Episode 3