To do this, Holden and Bill travel the country interviewing as many serial killers as they can.

Here, EW takes a look at where our favorite characters left off at the end of season 1.

Enter Bill Tench, the head of Behavioral Science at the FBI.

Mindhunter - Jonathan Groff and Holt McCallany

Patrick Harbron/Netflix

The two go on the road together to teach local cops the methodology of the Bureau.

By the end of the season, its clear his work has affected Holden more than he let on.

Debbie accuses him of being different, and the two break up.

MINDHUNTER

Patrick Harbron/Netflix

The last we see of him, hes lying on the floor of the hospital, clutching his chest.

Bill Tench

Bill spends much of the season reigning in the impulses of his partner.

Things come to a head when he and Nancy discuss, and argue, about therapy for their son.

MINDHUNTER

Patrick Harbron/Netflix

Holden, feeling betrayed, confronts Bill, who tells him he told the investigators the truth.

Annaliese doesnt think it is a good idea, but Wendy decides to leave for Virginia anyway.

She finds herself a new apartment, and one night in the laundry room she hears a cat meowing.

MINDHUNTER

Patrick Harbron/Netflix

Although she never actually sees the cat, she leaves it a can of tuna.

When she returns to it later, the can has been licked clean.

In the finale, Holden and Bill celebrate with local cops after solving a case.

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Netflix

A disappointed Wendy returns to Virginia with Holden.

He starts off as an ADT serviceman, installing security systems in peoples homes.

Season 2 ofMindhunterdebuts Aug. 16 on Netflix.