According to a post this morning on the Doctor Who Forum from Derek Hambly at Tenth Planet Events, Ian Collierpassed away. Collier was well known to fans as Omega, the renegade Time Lord villain from "Arc of Infinity," a role he later reprised in a special audio appearance for Big Finish Productions, the aptly titled "Omega". Collier also played Stuart Hyde in "The Time Monster" during the Jon Pertwee era, and also appeared in two additional Big Finish audios: as Bernice Summerfield's father Isaac in "Death and the Daleks," and Commisar Erco Sallis in "Excelis Decays" at the behest of the story's writer, the late Craig Hinton. Collier was a popular guest at conventions. He died October 1 due to unspecified causes.