Michael Gaston has appeared on “Chicago P.D.” before, and don’t be surprised if you don’t recognize him. His last appearance was way back in Season 2, Episode 6, where he appeared in “Prison Ball.” Gaston played Parish, a higher-ranking prison guard who gives an undercover Antonio Dawson (Jon Seda) a tour of the prison. At first, it might seem like Parish is a dirty guard, but he’s actually good at his job. When he thinks Dawson, who is going by the last name Herrera, is being sneaky and helping out inmates, he fires him on the spot. After outing himself as a UC, Parish helps out, which leads to the arrest of a 10-year-old’s murderer.
Gaston looks very different from his Season 2 appearance, where he didn’t support his now-signature mustache. We expect to see a lot more of the chief in Season 10 of “Chicago P.D.,” and he looks like he’ll be staying out of Voight’s way.