Key to all of ‘Last of Us’

New episode of HBO series changes Bill and Frank’s story from the game. Here’s why.

The third episode of “The Last of Us” takes viewers back to the beginning of the world’s fungal apocalypse.

Sunday’s installment, the most intimate of the series so far, introduced audiences to Bill (Nick Offerman), a gun-toting, paranoid, self-described survivalist who appears to have been one of the few people prepared to live in the world after the mysterious mutant cordyceps outbreak. Bill’s mistrust of the government meant that instead of being rounded up with the other residents of his town, he stayed behind to build a fortified base around his home, ready to live out the rest of his days blissfully alone.

Where: HBO

When: Sunday, 9 p.m.

Streaming: HBO Max, anytime

Rating: TV-MA (may be unsuitable for children under the age of 17)