“The Four Seasons” follows three couples on four vacations, two episodes per trip. Everyone is thinking about his or her middle-aged ennui and the routines — ruts? — of marriage, what companionship and friendship and sex look like in this chapter and the next.

The show is based on a 1981 movie with the same premise, written and directed by Alan Alda, who also starred. (He has a brief cameo here.) This Netflix version was created by Tina Fey, Lang Fisher and Tracey Wigfield, with Fey and Will Forte as Kate and Jack, the roles played originally by Carol Burnett and Alda. Their friend group is filled out by Steve Carell, Kerri Kenney-Silver, Colman Domingo and Marco Calvani, and the series’s plot is similar but not identical to that of the movie. The biggest change is that the prickly, talky humor and depth have been sanded down into mild, featherweight Netflix chow.

“The Four Seasons,” which arrived on Thursday, is pleasant enough, but it never shakes the fact that most people would rather listen to the cast than the characters. Such talent; such humor; such icons! Anyway, here’s a show where all of those lights are under a bushel basket.

In the first outing, everyone is at a lake house for the 25th wedding anniversary of Anne and Nick (Kenney-Silver and Carell). After a night of toasting one another and congratulating themselves on finding their soul mates, Nick shocks the guys by telling them that he plans to leave Anne. He isn’t happy, and she’s too stagnant.

Every marriage goes through phases when the spouses feel more like roommates than romantic partners, Jack says.

“I wish we were roommates,” Nick says. “Roommates hang out together. There’s porn about roommates. We’re like co-workers at a nuclear facility: We sit in the same room all night monitoring different screens.”