The answer is both yes and no. I personally feel season 5 was TBBT's low point thus far, While seasons 1-3 were the highs. There are some episodes in this set that definitely hit those highs, and are quite honestly some of my personal favorites in the entire series, but on the other end of the spectrum, there are some pretty bad episodes as well.

Season 6 starts off with 5 overarching plot episodes based around Howard's trip to space and return to Earth with a less than warm welcome. These are some very good episodes, the premiere has some nice moments during Amy and Sheldon's anniversary. Another highlight in the first 5 is when Game night turns into Men vs Women. These episodes put quite a bit of spotlight onto Howard and his accomplishment that no one else acknowledges, and I enjoyed them immensely, some character developing episodes for him.

The season has some great highlight episodes. We get a very good dramatic episode (rare for TBBT) called "The Closet Reconfiguration" where Sheldon being Sheldon, he cleans out Howard's closet and comes across an unopened letter sent to Howard from his father who abandoned him. They all get to show off their acting chops in this episode (especially Helberg) and it's a personal favorite of mine. We get another appearance from Wil Wheaton in "The Habitation Configuration" (Which Jim Parsons just won an Emmy for his work in) that turns into another fantastic episode when Sheldon has to choose between his friend or his girlfriend. "The Closure Alternative" involves one of Sheldon's favorite shows being cancelled, and lastly "The Proton Resurgence", which features Bob Newhart in an Emmy award winning guest appearance as Sheldon's childhood hero, Professor Proton. News broke that he'd be back for Season 7, it will be nice to see him again.

Of the weaker episodes, the standouts are "The Monster Isolation" which I found to be pretty boring, the episode centered on Raj's depression after being dumped by Lucy. "The Contractual Obligation Implementation" where Leonard, Sheldon and Howard try to convince younger kids to pursue Science falls pretty flat. All these episodes have their funny moments, but is an overall letdown.

As for the relationships, this season was a HUGE one. Leonard and Penny FINALLY take the next step in their relationship (Not what you might expect.) Sheldon and Amy continue to move forward at a Snails pace, with Sheldon finally considering more (Don't want to give much away.) Seeds are planted that a baby is possible for Howard and Bernadette in the future. For Raj fans of the show, Raj gets some much needed character development when he finally finds a girlfriend, who is essentially A reflection of himself, named Lucy. While it's nice to see Raj get some love and it makes sense, I'm not a huge fan of her character.

The cast is as great as ever, with their chemistry remaining tip top...Parsons again steals the show with his excellent physical comedy and strong delivery of his dialogue. Galecki plays off perfectly against Jim. Simon Helberg gets some meat to chew on this season and he kills it, especially the episode where he finds the letter from his father that was sent years earlier. The writing remains witty and top notch, that is conveyed perfectly on screen through the excellent performers. The writers need to continue with this great writing, The Big Bang Theory proves here why it's still one of the funniest shows on TV.

VIDEO
I checked out a couple episodes on Blu-ray, to compare it to the DVD version here, The Blu-ray version is quite better. The Standard definition gets the job done here, and is a very good transfer. The colors are crisp and clear.

AUDIO The audio track does a very good job here, all the lines were spoken clearly, and I did not notice any audio distortions

Subtitles from Portuguese, French, Mandarin Chinese, Thai, Spanish and Korean are included.

EXTRA'S We get some nice extra's here spread across the 3 discs.

Disc 1 The Big Bang Theory: The Final Comedy Frontier - About 11 Minutes in total, Astronauts Buzz Aldrin and Mike Massimino talk about Howard's time in space.

Houston We Have A Sitcom - A 10 minute Skype chat between the cast and Astronaut Joe Acaba.

Disc 2 The Big Bang Theory at PaleyFest 2013 - About 28 minutes in length, the cast and creators having a Q & A with a fan audience, telling on-set and off set stories. hosted by Pauley Perrette from NCIS.

Disc 3 Electromagnetism: The Best Relationship Moments of Season 6 - 4 different videos, 1 focused on Leonard/Penny, 1 on Sheldon/Amy, 1 on Howard/Bernadette and 1 on Raj. Basically interviews with the cast, talking about the relationships between the characters, intersected with moments from the season. A nice watch.

Gag Reel - A 9 minute outtake reel, there are none on here that stand out as overly funny, good for a one time watch.

OVERALL We get another solid season of The Big Bang Theory that delivers. It has a lot more ups than it does downs and some great character development for the main cast and relationships. It would have a higher rating from me if the Raj storyline was better, while I appreciate that writers gave some development to the character, I honestly thought the relationship between him and Lucy falls kind of flat (which I'm sure many will disagree with.) This is still another great season of The Big Bang Theory and I'm looking forward to season seven. Consider it HIGHLY RECOMMENDED.