"Mars vs. Mars" is the fourteenth episode of the first season of the American mystery television series Veronica Mars. The episode's teleplay was written by Jed Seidel and Diane Ruggiero, from a story by series creator Rob Thomas, and was directed by Marcos Siega. The episode premiered on UPN on February 15, 2005. The series depicts the adventures of Veronica Mars (Kristen Bell) as she deals with life as a high school student while moonlighting as a private detective. In this episode, Veronica and her father Keith (Enrico Colantoni) take opposing sides when Veronica's world history teacher, Mr. Rooks (Adam Scott) is accused of sexual assault on a student. Synopsis Immediately after the previous episode, Logan (Jason Dohring) appears at Veronica's door and asks Veronica to help find his mother, Lynn (Lisa Rinna), whom he believes is alive. Veronica agrees to help out. The next day in class, Veronica participates in a fun and unorthodox world history review with a teacher, Mr. Rooks (Adam Scott). However, the fun is disrupted when Carrie Bishop (Leighton Meester) tells the teacher that she's not pregnant and that he can "have [his] key back." Veronica talks to the teacher, but he denies that he ever touched Carrie. Meanwhile, Wallace Fennel (Percy Daggs III) steals Carrie's school file while Veronica asks Duncan (Teddy Dunn) for the name of his practitioner, wanting to find out what meds he was taking. Veronica angrily confronts Carrie about her lying. Veronica walks into Mars Investigations, when she learns that Keith has been hired by Carrie's parents, pitting father and daughter against each other. Later, Cliff McCormack (Daran Norris) fake interviews the woman who saw Lynn's suicide, and Logan blows up at her. Veronica visits Mr. Rooks's home, where she finds out the details of the parent-teacher conference a few months earlier: it was simply about grades on the midterm paper. However, Mr. Rooks does not have a lawyer for the hearing. Keith presents some increased evidence for his side to Veronica. Logan gives a tabloid newspaper to Veronica, which states that Lynn Echolls is still alive. Veronica interviews the woman who wrote the story, but the woman turns out to be a crazed fan. Logan is finally convinced that his mother is dead. Weevil (Francis Capra) tells Veronica about a freshman who says that Lynn Echolls jumped. Veronica talks to Mr. Rooks about his previous firing (which Keith attributed