Veteran actor Michael Rapaport guest-starred on The Big Bang Theory Season 9 Episode 6.
He came on board as a black market dealer. Of what, you may be asking? Of helium! Of course!
The latest installment of this CBS sitcom found Shelton and Leonard growing desperate because there was a nationwide shortage of this gas.
As a result, the characters took rather extreme measures, such as contacting Rapaport's shady dealer.
Did everything work out as planned? Did the scientists get the gas they needed?
Click on the video above, follow its instructions and watch The Big Bang Theory online now to find out!