Rob Lowe Reunites With Colton Haynes in ‘The Grinder’ Cold Open (Exclusive Video)

“Arrow” alum plays son to show-within-a-show lawyer on Fox sitcom

Colton Haynes guest stars on the new episode of Fox’s “The Grinder,” but he’s not exactly in for a happy reunion.

Haynes plays son to Rob Lowe‘s show-within-a-show character, lawyer Mitch Grinder, and he’s clearly one of those dads who puts work first.

As Haynes’ character shows up in military garbs, just in from overseas, there’s initially a touching father-son reunion. But as they get to work fixing up a boat, Grinder can’t quite help himself from being on the lookout for clues that will help him with his next case.

The latest episode of “The Grinder” will also feature the return of guest star Jerry Minor.

“The Grinder” airs Tuesdays at 9:30 p.m. ET on Fox.