The much-hyped season finale of Doctor Who provoked a mixed response among the show's most devoted fans.
The episode was met with disappointment from some viewers who felt deceived by last week's cliff-hanger in which the doctor apparently started to regenerate.
And following feverish anticipation that a new doctor would be introduced last night, some were left feeling let down by the show's outcome, leaving internet message boards awash with discontent.
Fans criticised scriptwriter Russell T Davies for the story line, suggesting it was written so David Tennant could continue his tenure as the Time Lord.
In a moving scene at the end of the episode, a half-human clone of the Doctor was left to live with Billie Piper's character Rose Tyler in another reality.
Tennant has been confirmed to star in Doctor Who in a Christmas special this year and another three specials next year.
One fan wrote: "The fake regeneration was a trick, a magic power to solve all the problems, AND a back-door way to let the doctor stay with Rose and travel in our universe at the same time -- so I found it very annoying.''
Another committed follower sounded similarly disgruntled, writing: "Wow. What an awful cliff-hanger resolution. Doctor Who has had some terrible cliff-hanger resolutions before... but this was horrible."