Kyle Gallner has landed the lead role of Dickie Chervinac on Showtime's single-camera comedy pilot "Insatiable." He will play the Chervinacs' wild son, a dangerous and rebellious teen who drinks and smokes and likes to blow things up. Gallner, who co-starred on the CW's "Veronica Mars," has recurring roles on CBS' "CSI: NY," playing Detective Mac Taylor's (Gary Sinise) stepson, and on the CW's "Smallville," playing the Flash. Gallner, who recently wrapped the feature "Gardens of the Night," is repped by the Gersh Agency and Artistry Management. … Tyler Kain, Mel Harris and Natalie Martinez have joined the cast of MyNetworkTV's upcoming soap "Saints & Sinners." A modern-day twist on "Romeo and Juliet," the series follows two feuding families — the Martins and the Capshaws — whose warfare is pushed to new levels when Roman Martin (Scott Bailey) and Julia Capshaw (Kain) fall in love. Harris will play Sylvia Capshaw, Julia's loving mother. Martinez will play Pilar Martin, Roman's religious sister. Kain is repped by Stone Manners and manager Holly Shelton. Harris, best known for her role as Hope Murdoch Steadman on "thirtysomething," recurred on "Stargate SG-1." Martinez plays Michelle Miller on MyNet's current drama "Fashion House." … Dawn Stern, Byron Mann, Ryan Belleville and Nicole Anderson have been cast in the ABC Family pilot "Nobody," based on the comic book of the same name. Stern will play Jessica. Mann (ABC Family's "Fallen") will play Mr. North. Belleville will play Marcus. Anderson will play Leila. … "The L Word" co-star Rachel Shelley has landed a multiepisode arc on CBS' "Ghost Whisperer." She will play Katie Payne, the fiercely intelligent wife of professor Rick Payne (Jay Mohr), who stirs up trouble for him and Melinda (Jennifer Love Hewitt). Shelley, who next will be seen in the romantic comedy "Gray Matters," is repped by Paradigm, ICM London and manager Kesha Williams. … Serena Scott Thomas ("The World Is Not Enough") has been tapped for a multiepisode arc on CBS' "NCIS," playing a mysterious international arms dealer. Thomas, who also co-stars on MyNet's upcoming soap "Wicked Wicked Games," is repped by the Agency Group and Crysis Management. … Janet Varney has joined Rob Roy Thomas' untitled scripted-improv comedy presentation for Fox, which centers on a reluctant congressional candidate from Arizona (Brendan Hines) who wins and goes to Washington. Varney will play his love interest. The actress, who co-hosts TBS' "Dinner & a Movie," is managed by Andy Corren. … Tim Dadabo has been added to the voice cast of Fox's animated comedy presentation "Two Dreadful Children." He is repped by WMA. … Eileen Galindo has been tapped for a six-episode arc on NBC's daytime soap "Days of Our Lives," playing Beverly, a seemingly nice woman whose true identity is later revealed: She is a child protective services agent, plotting to take Shawn and Belle's baby.