In Mexico, Ben (Douglas Smith) accompanies Frank (Bruce Dern), Lois (Grace Zabriskie) and Jodean (Mireille Enos) in their bird smuggling business.
Bill hopes to expand the Blackfoot Magic Casino into Idaho, but neither Jerry (Robert Beltran) nor Tommy (Adam Beach) are convinced.
Nicki crashes the hotel where Adaleen (Mary Kay Place) and J.J. (Željko Ivanek) to rescue Cara Lynn (Cassi Thomson) from getting engaged to an older man, threatening to kill J.J. if he contacts her again.
When Barbara scolds him for just thinking on himself, Bill takes her, Nicki and Margie (Ginnifer Goodwin) to a large house where he plans for his whole family to live together without fear.
Club gave the episode an "A–" grade and wrote, "“Under One Roof” didn't exactly cut the calories — in fact, it added yet another major headache for Bill and the wives — but it did give the right scenes the weight they deserved, and packed a serious emotional wallop in the end.
"[4] Alan Sepinwall wrote, "Gotta say that the show at the moment is feeling way, way too busy for me, with Bill's idiotic political campaign on top of the casino problems, whatever JJ's up to, Alby, and tonight's return of several old characters.
"[5] Nick Catucci of Vulture wrote, "this episode, Bill proves himself a true politician, making every easy, flawed compromise, grabbing for money, vindictively lashing out, and woodenly apologizing for his sexual misadventures.
But others actually dominate this terrific, messy ep, which sees the past burbling up like so much swamp gas — and a semi-shocking end to this season's most intriguing story line.
"[6] Allyssa Lee of Los Angeles Times wrote, "maybe the writers were trying to give us the best Presidential Olympic Valentine Year of the Tiger gift ever, because “Under One Roof” was pretty great – it fired on all cylinders and had a super strong finish.
"[7] TV Fanatic gave the episode a 4.5 star rating out of 5 and wrote, "We loved that Bill was able to show his family his big dream house.