Patrick Dempsey and Christian Slater are having a Mobsters reunion, over three decades in the making. Both actors appear in the Dexter prequel series, Dexter: Original Sin — but the last time they shared the screen was in 1991, as young mobsters taking over New York City in the 1920s.

Christian Slater says his new crime dramedy, Dexter: Original Sin, was a nostalgia trip in more ways than one. In addition to being helmed by Slater's Heathers (1988) director Michael Lehmann and co-starring Slater's former Mobsters (1991) cast-mate Patrick Dempsey,

Christian Slater joins Saturday TODAY to talk about starring in the new series called “Dexter: Original Sin.” It’s a prequel to the original “Dexter” series from 2006. He also opens up about the time TODAY’s Laura Jarrett helped out with his family and how he competes in obstacle courses for fun.