TUESDAY, OCTOBER 31

"VERONICA MARS" - (9:00-10:00 p.m. ET)

"President Evil" (TV-PG, DLV) (HDTV)

A HALLOWEEN TO REMEMBER - It's Halloween at Hearst and while Veronica (Kristen Bell) is looking for Logan (Jason Dohring) at the underground campus casino, the place is robbed and the thieves take Veronica's necklace, given to her by Lilly Kane (Amanda Seyfried, who does not appear in the episode). Meanwhile, Dean O'Dell (guest star Ed Begley, Jr., "Arrested Development") and his wife Mindy (guest star Jamie Ray Newman, "E Ring") seek Keith's (Enrico Colantoni) help in tracking down Steve (guest star Richard Grieco, "21 Jump Street"), the biological father of Mindy's son, who is deathly ill. Wallace (Percy Daggs III), distracted by a new group of friends, struggles to pass his Mechanical Engineering class. Ryan Hansen, Michael Muhney, Tina Majorino, Chris Lowell, Francis Capra and Julie Gonzalo also star. Nick Marck directed the episode written by Jonathan Moskin and David Mulei (#3T58045).