The new Netflix series 'Mindhunter' looks at an elite FBI profiling unit during the 1970s

NEW YORK - To meet Jonathan Groff and Holt McCallany, stars of the Netflix series "Mindhunter," you'd never suspect they recently spent 10 long months consumed with the darkest reaches of the human psyche.

Groff, a charmer known for playing the lead in HBO's "Looking" and King George in the original Broadway version of "Hamilton," laughs generously as McCallany, a seasoned character actor and gabby raconteur with a booming voice, shares a story about training to throw out the first pitch at a Mets game.

Yet given their obvious rapport, it's easy to see why they were cast as the leads in "Mindhunter," which debuts Friday. The psychological drama, executive produced by David Fincher and Charlize Theron,