character is also loosely based on Reichs, producers decided to name her Temperance Brennan, after the character in Reichs' novels; Reichs has stated that she views the show as somewhat of a prequel to her novels, with the TV show's Temperance Brennan as a younger version of the novels' Temperance Brennan. In order to make Bones a unique crime drama in the midst of the multiple procedural dramas that already populated network television like the Law & Order and CSI franchises, Hanson decided to infuse the show with as much dark humor and character development as possible. Another element conceived for the show was the "Angelatron", a holographic projector that provides a way to replace the flashbacks often used by other procedural shows. In addition to their expositional purposes, the holographic images, which are created by visual effects, brought a unique visual style to the show that the producers were looking for. Casting David Boreanaz was the first actor to be cast in Bones. Series creator Hart Hanson described the actors who had auditioned for the role of Seeley Booth as "pretty boy waifs"; he immediately responded when the head of the studio, Dana Walden, suggested Boreanaz for the role. Boreanaz was offered the role but was unenthusiastic about getting involved after a difficult meeting with executive producers Barry Josephson and Hart Hanson, even though he thought the script was well written. However, after the producers contacted him again to convince him to accept the role, Boreanaz agreed to sign on and was cast as Seeley Booth. Emily Deschanel was cast in the role of Temperance Brennan just before production began on the Bones pilot. After Deschanel finished the film Glory Road, the film's producer Jerry Bruckheimer recommended that she audition for Bones. Deschanel impressed Hart Hanson at her audition with her assertiveness. In a tense moment in the audition scene, David Boreanaz stepped closer to Deschanel; and Deschanel held her ground rather than retreating as most of the other actresses did. Hanson remarked that, in such a situation, "90% of actors would take a step back". Deschanel was subsequently cast in the role. Beginning with season four, Zack Addy (Eric Millegan) was replaced by a succession of lab assistants: Wendell Bray (Michael Grant Terry), Colin Fisher (Joel Moore), Arastoo Vaziri (Pej Vahdat), Vincent Nigel-Murray (Ryan Cartwright), Clark Edison (Eugene Byrd) and Daisy Wick (Carla Gallo). One—Scott Starett (played by