Question: Which American television actor appeared in the CW noir drama "Veronica Mars" and "Graduation" directed by Mike Mayer?
Context: Veronica Mars is an American teen noir mystery drama television series created by screenwriter Rob Thomas.  The series is set in the fictional town of Neptune, California, and stars Kristen Bell as the eponymous character.  The series premiered on September 22, 2004, during television network UPN's final two years, and ended on May 22, 2007, after a season on UPN's successor, The CW, airing for three seasons total.  "Veronica Mars" was produced by Warner Bros.  Television, Silver Pictures Television, Stu Segall Productions, and Rob Thomas Productions.  Joel Silver and Rob Thomas were executive producers for the entire run of the series, while Diane Ruggiero was promoted in the third season. Play It Again, Dick is an American meta comedy web television series that was released on The CW's online platform, CW Seed, on September 16, 2014.  It functions as a short spin-off series of the teen noir show "Veronica Mars", which aired between 2004 and 2007; the show contains appearances by most of the original starring cast.  The series follows a fictionalized version of Ryan Hansen as he attempts to convince his "Veronica Mars" cast-mates to participate in a spin-off centered around his character, Dick Casablancas.  The series was created and executive produced by Rob Thomas, produced by Danielle Stokdyk and Ryan Hansen, written by Thomas and Bob Dearden, and directed by Viet Nguyen. "Weevils Wobble But They Don't Go Down" is the nineteenth and penultimate episode of the third season of the American mystery television series "Veronica Mars", and the 63rd episode overall.  Written by Phil Klemmer and directed by Jason Bloom, the episode premiered on The CW on May 22, 2007.  The series depicts the adventures of Veronica Mars (Kristen Bell) as she deals with life as a college student while moonlighting as a private detective. "Veronica Mars" is an American television series created by Rob Thomas.  The series ran for three seasons; it premiered on September 22, 2004, during UPN's last two years, and ended on May 22, 2007, after a season on UPN's successor, The CW.  The series balances murder mystery, high school and college drama, featuring social commentary with sarcasm and off-beat humor in a style often compared to film noir.  Set in the fictional town of Neptune, "Veronica Mars" starred Kristen Bell as the title character, a student who progressed from high school to college during the series while moonlighting as a private investigator under the wing of her detective father.  Episodes have a distinct structure: Veronica solves a different "case of the week" while continually trying to solve a season-long mystery.  The first two seasons of the series have a season-long mystery arc, in which the conflict is introduced in the first episode of the season and resolved in the finale.  The third season takes on a different format, focusing on smaller mystery arcs that last the course of several episodes. "The Bitch Is Back" is the series finale of the American mystery television series "Veronica Mars", the twentieth and final episode of the show's third season, and the 64th episode overall.  Co-written by series creator Rob Thomas and executive producer Diane Ruggiero and directed by Michael Fields, the episode premiered on The CW on May 22, 2007, directly after the previous episode, "Weevils Wobble But They Don't Go Down".  The series depicts the adventures of Veronica Mars (Kristen Bell) as she navigates life as a college student while moonlighting as a private detective. "Mars, Bars" is the fourteenth episode of the third season of the American mystery television series "Veronica Mars", and the fifty-eighth episode overall.  Directed by Harry Winer, with a story by Phil Klemmer, John Enbom, and Joe Voci and a teleplay by Klemmer and Enbom, the episode premiered on The CW on February 20, 2007.  The series depicts the adventures of Veronica Mars (Kristen Bell) as she deals with life as a college student while moonlighting as a private detective. "There's Got to Be a Morning After Pill" is the twelfth episode of the third season of the American mystery television series "Veronica Mars", and the fifty-sixth episode overall.  Directed by Tricia Brock, with a story by Jonathan Moskin and David Mulei and a teleplay by Moskin, Phil Klemmer, and John Enbom, the episode premiered on The CW on February 6, 2007.  The series depicts the adventures of Veronica Mars (Kristen Bell) as she deals with life as a college student while moonlighting as a private detective. Veronica Mars is the fictional protagonist, occasional narrator (through voiceovers), and antiheroine of the American television series "Veronica Mars", which aired on UPN from 2004 to 2006 and on The CW from 2006 to 2007.  The character was portrayed by Kristen Bell through the duration of the series.  Following the show's cancellation, Bell reprised the role in the 2014 film continuation.  The character, created by Rob Thomas, was originally male and the protagonist of his unproduced novel "Untitled Rob Thomas Teen Detective Novel", which eventually became the basis of the series.  After the work's transition from novel to television series, Thomas changed the character's gender from male to female as he believed a noir piece told from a female point of view would be more interesting. Christopher Lowell (born October 17, 1984) is an American television actor.  He played the role of Stosh "Piz" Piznarski in the CW noir drama "Veronica Mars" and the character William "Dell" Parker in the ABC "Grey's Anatomy" spin-off "Private Practice". Brian Ralston (born April 12, 1974) is a composer and musician living in Los Angeles.  Ralston is a graduate of the University of Arizona and the USC Thornton School of Music Scoring for Motion Pictures and Television program.  Brian's latest film is the 2017 drama Rose starring Cybill Shepherd, James Brolin and Pam Grier.  In 2012 he scored the 20th Century Fox inspirational sports film Crooked Arrows, starring Brandon Routh, directed by Steve Rash.  He has also composed music for the television series "Angel" (Season 4) and scores to the theatrical motion pictures "9/Tenths", directed by Bob Degus ("Pleasantville") starring Gabrielle Anwar, Henry Ian Cusick and Dave Ortiz, the Magnolia Pictures teen heist movie Graduation directed by Mike Mayer and starring Adam Arkin, Shannon Lucio, Chris Marquette, Riley Smith and Chris Lowell, and the dramatic feature Don't Fade Away directed by Luke Kasdan, starring Beau Bridges, Mischa Barton and Ryan Kwanten.
Answer: Chris Lowell