The Helium Insufficiency Season: 9 Episode: 6 Air Date: 2015-10-26
GUEST STARS: John Ross Bowie, Michael Rapaport, Elena Campbell-Martinez
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.