It’s comforting to know that long after the collapse of civilization, certain TV clichés will persist. Like: If a woman vomits unexpectedly in one episode, in the next episode we will find out she is pregnant.

So it goes with Dina, who puked in last week’s “The Last of Us” after stumbling across some human corpses, and noted at the time that her reaction was unusual, given that she often sees (and smells) dead people. Sure enough, in this week’s episode, Dina finds some pregnancy tests in a Seattle drugstore and gives several a try. They all come up positive.

Dina does not say anything to Ellie — or to those of us watching at home who had not already guessed her secret — until close to the end of the episode, after the two of them have narrowly escaped multiple waves of Wolves and zombies. Her confession retroactively lends weight to everything these two women have just gone through. They have so much more at risk now.

As was the case last week, a good portion of this episode is spent watching Dina and Ellie’s relationship blossom. They bounce sardonic, deadpan repartee back and forth. (Ellie, when Dina is exploring on her own: “Shout if something tries to kill you.” Dina: “That’s the plan.”) They share stories from their pasts, with Dina confessing that when she was little she told her mother she liked both boys and girls — to which her mom said, “No, you like boys.” They also fall into each other’s arms, making passionate love.

Overall, there are three major revelations that Dina and Ellie share. One is the pregnancy. The other is that they have feelings for each other. And because of extenuating circumstances, Ellie also reveals to Dina that she is immune from the cordyceps infection. (I will come back to that later.)

Unlike last week, all the charming chitchat is balanced with harrowing action. Dina and Ellie’s expedition into Seattle gets off to a quiet start, highlighted by a trip to an abandoned music store, where Ellie serenades Dina with a lovely acoustic rendition of A-ha’s “Take on Me.” The scene is beautifully staged and lit, with sunshine streaming in from a weed-and-moss-covered hole in the wall. At the end, Dina says Joel taught Ellie well. In a quiet voice laden with meaning, Ellie responds, “He did.”

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