Nora Dunn ("Saturday Night Live," "Amber Frey: Witness for the Prosecution"), Steven Eckholdt ("The L Word," "The West Wing") and Ron Glass ("Barney Miller") Guest Star "Dr. Feelbad" -- Convinced that a prominent heart surgeon actually murdered his so-called missing wife, Sebastian enlists his team's help in building a compelling case against the man, on SHARK, Thursday, Oct. 5 (10:00-11:00 PM, ET/PT) on the CBS Television Network. John Showalter directed the episode written by Keith Eisner, the series' supervising producer. Steven Eckholdt ("The L Word," "The West Wing"), Nora Dunn ("Saturday Night Live," "Amber Frey: Witness for the Prosecution") and Ron Glass ("Barney Miller") guest star, respectively, as the missing woman's husband, his lawyer and the trial judge. Despite not having a body to prove a murder actually occurred, Sebastian encourages his team to use creative means to secure evidence from Dr. Mitchell Sterling's home and obtain testimony from his eight-year-old son, Ethan. A DNA match to the wife's blood on the Sterling's master bedroom rug, the son's revelations of the night of his mother's alleged disappearance and suspicious phone records give the team a running start in the trial as they continue to dig for more evidence. However, after a couple of their preliminary theories don't pan out, they fear that, though they remain confident of Sterling's guilt, they may have too much riding on the testimony of his frightened young son. Meanwhile, used to living on his own, Sebastian's frustrated when Julie chides him for two-timing his girlfriend, Rachel. SERIES REGULARS: Sebastian Stark James Woods Jessica Devlin Jeri Ryan Casey Woodland Sam Page Raina Troy Sophina Brown Martin Allende Alexis Cruz Madeleine Poe Sarah Carter Julie Stark Danielle Panabaker GUEST CAST: Dr. Mitchell Sterling Steven Eckholdt Yvonne Sterling Lisa Kaminir Ethan Sterling Joseph Castanon CSI Tech Terry Savage Gretchen Curbow Nora Dunn Dr. Charlie Bender Patrick Fabian Rachel Conway Christina Chambers Prinipal Edward Koosman David Bickford Judge Stewart Fenton Ron Glass Amber Sellers Aimee Brooks Mickey Cruz-Alvarez David Barrera Alex Neuville Anjul Nigam Andrew Borofsky Dan Sachoff Lewis Slocombe Michael Cotter Detective Gilbert Glenn Brown Nurse K.T. Thangavelu DRAMA, LAW, MYSTERY RATING: To Be Announced On the web: http://www.cbs.com/primetime/shark/ Photos now available at www.cbspressexpress.com