Every good narrative needs someone wearing the black hat, and in at least the first two episodes of “The Last Dance,” the ESPN documentary about Michael Jordan, that man is Jerry Krause.

Who was Krause? And why did he play such a big, and contentious, part in the Chicago Bulls’ dynasty and Jordan’s career?

What happens in the documentary?

In the opening episodes, Krause is depicted as being hungry to take credit for the work that the Bulls players are putting in on the floor.

“He had a way of alienating people,” the team’s owner, Jerry Reinsdorf, said in the documentary.

The documentary shows scenes of Jordan openly mocking Krause for his weight and details the acrimonious relationship Phil Jackson had with Krause. When Krause’s stepdaughter got married, Krause invited much of the team — but not Jackson.