In 2003, he was involved with "Scream of the Shalka", a webcast based on the science fiction series "Doctor Who". He played the voice of the Doctor's nemesis the Master alongside Richard E. Grant as the Doctor. In the same year, he also appeared in "Deadline", an audio drama also based on "Doctor Who". Therein he played Martin Bannister, an ageing writer who makes up stories about "the Doctor", a character who travels in time and space, the premise being that the series had never made it on to television. Jacobi later followed this up with an appearance in the "Doctor Who" episode "Utopia" (June 2007); he appears as the kindly Professor Yana, who by the end of the episode is revealed to actually be the Master. Jacobi admitted to "Doctor Who Confidential" he had always wanted to be on the show: "One of my ambitions since the '60s has been to take part in a "Doctor Who". The other one is "Coronation Street". So I've cracked "Doctor Who" now. I'm still waiting for "Corrie"."