Here is the official press release for The Big Bang Theory Season 9 Episode 6, "The Helium Insufficiency" - airing October 26th.
Season 9 Episode 6 "The Helium Insufficiency"
LEONARD AND SHELDON ARE FORCED TO MAKE A BLACK MARKET PURCHASE IN ORDER TO COMPLETE AN EXPERIMENT
Michael Rapaport Guest Stars as Kenny, a Black Market Dealer
In the midst of a nation-wide helium shortage, Sheldon and Leonard take desperate measures to get the supplies they need. Also, Penny and Bernadette download a dating app on Amy's phone to try and find her a new man.
Johnny Galecki (Leonard
Jim Parsons (Sheldon)
Kaley Cuoco (Penny)
Simon Helberg (Wolowitz)
Kunal Nayyar (Koothrappali)
Mayim Bialik (Amy)
Melissa Rauch (Bernadette)
guest & recurring cast:
Michael Rapaport (Kenny)
Elena Campbell-Martinez (Maria)
Kevin Sussman (Stuart)
John Ross Bowie (Barry Kripke)