sentences:  The audio play was also broadcast on digital radio station BBC7, on 10 December 2005 (as a 2-hour omnibus), and was repeated in six parts as the opening story to the Eighth Doctor's summer season, which began on 16 July 2006.The webcast version (originally broadcast via BBCi's "Red Button") remains available from the BBC "Doctor Who" "classic series" website, and an expanded audio-only version is available for purchase on CD from Big Finish.This expanded version was the one broadcast on BBC7.