The Grinder has his first major case of the year.

On Tuesday's episode — titled "The Olyphant in the Room" — Dean (Rob Lowe) tries to figure out who's been smashing car windows in Boise, but that's child's play compared to the real mystery at hand: What's going on between Claire (Natalie Morales) and Timothy Olyphant?

See what he and Todd (Steve Little) come up with in the exclusive sneak peek below.

The Grinder returns Tuesday at 9:30/8:30c on Fox.