Jamie Kennedy Jamie Kennedy

Ghost Whisperer's Jamie Kennedy will guest-star on an episode of Eureka.

Kennedy (Scream, The Cleveland Show) will play Dr. Ramsey, the creator of a technology that threatens to incinerate the town of Eureka. The 39-year-old actor will appear in one episode, which is slated to air in July.

Wil Wheaton to guest-star on Eureka

Jaime Ray Newman, Matt Frewer and Wil Wheaton will also guest-star in Season 4, which debuts on Friday, July 9 on Syfy.