Here's a Comi Con interview with Mekhi Phifer discussing his Torchwood character CIA agent Rex Mattinson. He also explains why he considers himself a nerd in this clip as well.
By the way, the t-shirt he's wearing is promotion for his website thirdREEL. The film site is an exhibition, pay-per-view distribution platform for filmmakers looking for a place to stream their films. The website states...thirdREEL is a thriving exhibition platform for filmmakers seeking innovative distribution and generous revenue opportunities. With thirdREEL, filmmakers can build a brand, establish a following, and generate revenue around their features, documentaries and short films. You can check it out HERE.