This Week in TV:

Community season 6 adds two new main cast members; Showtime renews Homeland and The Affair; the final season of Justified gets a new trailer; USA renews Graceland for season 3; CBS cancels The Millers just four episodes into season 2; and the Showtime pilot Happyish casts Kathryn Hahn (Bad Words, Step Brothers) as its female lead.

With Community season 6 headed to Yahoo! Screen in early 2015, the comedy rounded out its new cast by adding Paget Brewster (Criminal Minds) and Keith David (Enlisted) as series regulars.

Brewster is set to play Francesca “Frankie” Dart, a consultant hired to help shape up Greendale, while David will play Elroy Patashnik, a retired scientist who is looking to reinvent himself. The two cast members will replace Donald Glover (Troy) and Yvette Nicole Brown (Shirley), after Glover left the show during season 5 and Brown decided not to return earlier this fall.

Interestingly, Brewster and David have appeared on the former NBC series before, but in different roles. In season 5, Brewster guest-starred as Debra Chambers, Greendale’s IT department boss, and David narrated the season 3 episode titled ‘Pillows and Blankets.’

While these actors are best known for their dramatic roles, both also have some notable comedy credits on their respective resumes, with Brewster having appeared on Key and Peele and Modern Family, and David having last served on the short-lived FOX military sitcom Enlisted.

With production on Community season 6 beginning this week, the batch of 13 new episodes is set to air exclusively on Yahoo!Screen early next year.

Showtime renewed freshman drama The Affair for a 10-epsiode second season and veteran series Homeland for a 12-episode fifth season – both of which will air in 2015.

While we certainly expected Showtime to renew its current flagship drama Homeland – which is averaging six million viewers across platforms per episode in season 4 - The Affair has performed above most expectations in its rookie year, scoring an average of nearly four million viewers across platforms. Though Homeland has lent a hand to The Affair as a strong lead-in on Sundays, the new drama has been able to grow its own viewership each week thanks to compelling central performances and smart storytelling.

On the subject of both renewals, Showtime President David Nevins said:

“With thought-provoking, relevant and addictive storylines, both series have been embraced, dissected and much debated week after week. We’re excited to see more from these complex shows in 2015.”

The Affair season 1 continues with ’6′ on Sunday @9pm on Showtime, and the next episode of Homeland season 4, ‘Halfway to a Donut,’ will directly follow @10pm.

USA Network announced a season 3 renewal (13 episodes) for its crime procedural Graceland.

While the series hasn’t always been a top performer for the network, it has established a devoted following that will be relieved to see the show return after a shocking season 2 finale left viewers with multiple dramatic cliffhangers (one involving the fate of a main character).

The fate of the series itself appeared to be in serious doubt, but a substantial increase in DVR viewership in the 18-49 demo may have been enough to save it. USA Network President Chris McCumber said this about the show’s renewal:

“This season of ‘Graceland’ took viewers on a wild ride with unexpected character twists, and a heart-stopping cliffhanger that left a lead character’s fate in question. [Creator] Jeff Eastin and the talented ensemble cast deliver on all levels, and Season 3 will undoubtedly continue to keep us on the edge of our seats.”

Expect to see Graceland season 3 on USA in 2015.

CBS canceled sitcom The Millers just four episodes into the show’s second season.

Although the series had seen a significant decline in ratings after narrowly dodging the network’s axe last year, the timing of the decision is still a surprise considering the comedy is only a few episodes into its sophomore run. For now, CBS is reportedly planning to pull the plug after Monday’s (Nov. 17) episode, even though a timeslot replacement has not been announced.

Since moving from its Thursday night slot – where it benefited from The Big Bang Theory as its lead-in – The Millers has performed to series-low ratings behind 2 Broke Girls on Mondays. The network tried to reinvigorate interest in the comedy by adding Sean Hayes (Will & Grace) to a cast that included Margo Martindale, Beau Bridges and Will Arnett, but unfortunately, the sitcom veteran’s appeal wasn’t enough to bolster the show’s dismal numbers.

CBS will likely air the series finale of The Millers on Monday, November 17 @8:30pm.

Showtimes’s half-hour comedy pilot Happyish cast Kathryn Hahn as its female lead.

Hahn will play Lee Payne, the fierce, funny and defiant wife of Thom (played by Steve Coogan) and mother to a six-year-old son Julius in the series, which is described as a scathing examination of our pursuit of happiness.

Here’s an official description of her character:

Honest and direct to a considerable fault, Lee believes that people are good and the world can be a better place, which is probably why she is so pissed off: because we aren’t, and it can’t. But she loves Thom, and Thom loves her, even though they both loathe themselves.

Hahn played the part in a previously filmed pilot for the show in 2013, which co-starred the late Philip Seymour Hoffman as Thom. Along with Coogan, Bradley Whitford (The West Wing) has joined the cast this time around as Thom’s boss Jonathan Cooke.

We’ll pass along more info on Happyish as it comes in.