Who wants to be a millionaire? Clark Needham does! The Rice graduate student in bioengineering will be a contestant Tuesday on the popular “Millionaire” game show hosted by Meredith Vieira (pictured with Needham). The show will air at 2 p.m. Feb. 26 on KTRK, Channel 13. Needham is studying gene therapy and learning how to use bone marrow to repair cartilage for people with knee issues. Photo by Disney-ABC.