Wayne Knight

Seinfeld star Wayne Knight has been tapped to guest-star on an episode of The Whole Truth, TVGuide.com has learned exclusively.

Knight, 55, best known for playing Jerry Seinfeld's nemesis, will play Judge Mark Hulverson on Truth.

Ratings: Whole Truth improves; other legal dramas fall

In the same episode, Lost actor Harold Perrineau plays a self-described psychic who has professional and personal ties to the case at hand.

Knight has also appeared in Hot in Cleveland, CSI, Nip/Tuck, the film Jurassic Park. He also lent his voice to Toy Story 2.

The freshman ABC legal drama drew 4.5 million viewers last week, bouncing back 17 percent in the 18-to-49 demographic. Truth is pre-empted this week for a 20/20 special on the Chilean Miners who were just rescued.