The Big Bang Theory Season 9 Episode 11 was without a doubt the best episode of the season so far. "The Opening Night Excitation" gave us a moment we'd been waiting for but never knew if it would actually come – Sheldon and Amy spent the night together for the first time. It was handled perfectly, and for a funny twist, it was paralleled with the rest of the guys seeing the new Star Wars movie.

This season had a rocky start, particularly with The Big Bang Theory Season 9 Episode 2. It took a negative tone as most characters were either angry or sad, and the fight between Leonard and Penny felt like a waste of time.

The best quote of the season so far comes from the best episode of the season, The Big Bang Theory Season 9 Episode 11, when Sheldon decides that for Amy's birthday, he'll have coitus with her. "Then it's settled. Amy's birthday present will be my genitals."

The death of cultural icon Leonard Nimoy was something that The Big Bang Theory needed to address, but it waited a bit before it did so. On The Big Bang Theory Season 9 Episode 7, the show gave tribute to Leonard Nimoy by having his son on the show to do a "documentary" with one of Mr. Spock's biggest fans: Sheldon. This was also the episode when Sheldon's friends learned of his plans to propose to Amy.

Stuart used to be a funny addition to the cast, but he's gone from quirky and comical to downright creepy, particularly in The Big Bang Theory Season 9. So many of the things he says and does are simple more uncomfortable than they are funny.

Bob Newhart as Professor Proton is always fabulous on The Big Bang Theory. He appears to Sheldon in a dream to offer some important advice on The Big Bang Theory Season 9 Episode 11, dressed, of course, as a Jedi.