When is a spoiler no longer a spoiler? Because all of the Harry Potter books have been published for years and the movies have all been released, I'd say that it's outside that time frame. Though, if you know your friend is reading them for the first time, you don't SPOIL it for them! Oh, Sheldon!

"The Spoiler Alert Segmentation" took the never-ending debate about spoilers and put it front and center. It was okay for The Big Bang Theory to mention the Harry Potter deaths because they aren't spoilers any more. However, The Walking Dead one is a little more iffy, especially since the comedy is shown worldwide and I'm guessing that the zombie drama hasn't been released everywhere. Bad show!

Regardless, it was an appropriate theme for The Big Bang Theory. But, it was difficult to imagine that Leonard hadn't already read Harry Potter or that he doesn't watch The Walking Dead live on Sunday nights. And even more incredulous was out of all the things Sheldon has done, it was a spoiler and a few soy milk jokes that pushed Leonard over the edge. If the jokes are funny, though, it doesn't discount the enjoyment of the series.

It's pleasant to see that Leonard and Penny have become comfortable with their relationship, such that he didn't even consider it being an issue for him to live with her. Of course, it was a spontaneous decision, but they are moving forward. And even though Penny wasn't sure she wanted Leonard there, she considered it. At previous points in their relationship, she would have yelled at him and unceremoniously thrown him back across the hall. 

Instead, she casually attempted to get Leonard to realize he couldn't leave Sheldon:

Penny: But, you two make such a cute couple. Like Bert and Ernie. You guys even teach me stuff about words and numbers. | permalink

After Sheldon's revelation last Thursday about his relationship with Amy, he was pushed too fast. It's rare that Sheldon is at a loss for words, but he said "Umm..." quite a bit to Amy. 

Amy: Here I am?
Sheldon: Wait. Here who is where? | permalink

When she got his detailed meal correct, it looked like a perfect roommate pairing. Too bad Amy over played it with the phone message, which brought Sheldon back to reality. The new roommate arrangements weren't meant to be, but they did provide for an episode of laughs.

While Leonard and Sheldon were dealing with their new roommates, Raj was dealing with a new one of his own, Mrs. Wolowitz! He was a good friend to Howard and what did it get him? A controlling wannabe mother and the role of a replacement son. Poor guy! At least, he got good food, silk pajamas and someone to wash his clothes for him. The bath, however? That was a bit too much.

Howard was in Vegas and we finally got to SEE his mother. It was only a brief moment, but she was there. On screen. For real. Not just a dot on a picture from a satellite or an annoying voice from the other room. We saw her walk across the kitchen and her hands as she prevented Raj from escaping through the window. Is it possible that we'll see her in her entirety this season? Are you disappointed that she was revealed at all? Or was it about time?

Despite the odd set-up for the episode, it had plenty of hilarious lines and moments. It made me laugh and not cringe, so that's a good sign since it's usually been one or the other for The Big Bang Theory season 6.

Check out some of the funniest lines in our The Big Bang Theory quotes section and share your faves in the comments!

Carla Day is a staff writer for TV Fanatic. Follow her on Twitter and on Google+.