The Mass Effect universe is a rich and vibrant place, made so in equal parts by its fascinating variety of resident species and its talented cast of voice actors. These actors give that enormous galaxy a uniquely personal flavor—and they've got serious nerd cred, as well. From The Matrix to Battlestar Galactica—and even as close to home as Dragon Age: Origins—we think you'll agree that these geeky celebs lend the Mass Effect series a serious dose of credibility. Be sure to let us know in the comments or on Twitter if you think we're wrong.