Louise Lee
With the working title of "Detective Columbo", the sales presentation trailer of "Bullet Brain" was first revealed at TVB's "Programme Presentation 2012" in November 2011. The trailer, which starred Wayne Lai, Louise Lee, Tavia Yeung, and Evergreen Mak, was the second to the last trailer to air at the event. In December 2011, Lee announced that "Bullet Brain" is slated to begin filming in May 2012, but remained tight-lipped on the other details of the production. However, due to the studio's decrease in staff capacity, Lee lost many of his creative directors and scriptwriters, which will affect the pace of production. He further added that the cast seen in "Bullet Brain"'s presentation trailer are not confirmed to star, with the exception of Wayne Lai.