Disagreements arising from Sheldon (Jim Parsons) and Amy‘s (Mayim Bialik) attempts to live together provide the show a chance to offer some interesting pairings in “The Hot Tub Contamination.” While the episode derives its title from the (less interesting) B-story involving Howard (Simon Helberg) and Bernadette‘s (Melissa Rauch) discovery of what happens in their home when some of their friends think they aren’t around, more interesting is the pairing of Penny (Kaley Cuoco) and Sheldon, which delivers the truth behind Sheldon’s committal to always knock three times, and the far-less developed camaraderie between Leonard and Amy who do some bonding of their own over the whackadoodle they both know and love.
“The Military Miniaturization” is a fine, if forgettable, episode. In the main story Leonard (Johnny Galecki), Sheldon (Jim Parsons), and Howard (Simon Helberg) fret over the ethical implications surrounding the Air Force’s offer to fund their research. The back-up story features a pissed-off Bernadette (Melissa Rauch) learning that Penny (Kaley Cuoco) accidentally spilled the beans about her pregnancy to her coworkers (possibly costing her lead on a big project). The episode’s only real stand-out moment comes when Sheldon reacts silently to the Air Forces pitch (although the scene would have been more memorable had the scientist been able to keep his silence throughout the entire sequence).
In an episode that will culminate in the return of Shamy, Sheldon (Jim Parsons) begins going crazy after getting a song stuck in his head his eidetic memory is incapable of recognizing. Driving both Penny (Kaley Cuoco) and Leonard (Johnny Galecki) crazy as well, Sheldon will eventually not only remember the name of the song but realize its meaning to him. There’s plenty of fun frantic Sheldon moments throughout before Sheldon admits his feelings for Amy first to himself (and Leonard and Penny) and later to his girlfriend.
Relationship problems are the common theme of the second episode of The Big Bang Theory‘s Ninth Season. Hoping to alleviate Penny‘s (Kaley Cuoco) discomfort, Leonard (Johnny Galecki) talks with the woman (Melissa Tang) he made out with during their time apart. After making a realization during that awkward conversation (mostly for the marine biologist), he finally sits down and talks honestly with wife about their mutual fears about the other leaving them for greener pastures. Although it’s not the case with every relationship this week, by the end of the episode the Hofstadters appear to finally be be back in a good place.
Relationship change is at the center of every storyline in the show’s Eighth Season finale that teases big changes for every single character but (mostly) fails to follow through. After some nagging by Sheldon (Jim Parsons), Leonard (Johnny Galecki) and Penny (Kaley Cuoco) begin discussing a wedding date and eventually agree to a spontaneous wedding in Vegas, although a late reveal from Leonard spoils the mood and leaves the couple in a nebulous state still on their way to Vegas but without the finale delivering the long-promised ceremony.
The joy of Sheldon (Jim Parsons) and Amy (Mayim Bialik) deciding to share a pet turtle is lessened when Dr. Cooper casually mentions he’s applied for the upcoming Mars mission without first informing his girlfriend. The episode includes Sheldon’s Mars video audition and a rather sweet make-up moment between Cooper and his girlfriend. Meanwhile, in an attempt to jump start their sex life, Leonard (Johnny Galecki) and Penny (Kaley Cuoco) do a little full-body naked sex painting that doesn’t turn out as planned.
Separate guys and girls weekends don’t go as planned for anyone involved as the ladies head off for a fun Las Vegas weekend leaving the boys distraction-free to work. Well, as it turns out, not so distraction-free. Although Bernadette (Melissa Rauch) and Amy (Mayim Bialik) have plenty of alcohol-induced fun on their own, Penny (Kaley Cuoco) isn’t so lucky staying in the hotel room the entire night boning up for a presentation.