Board Thread:The Panopticon/@comment-27280472-20160606210324/@comment-20607870-20161108184217

Dr Who guide says this

''Since the Seventh Doctor apparently dies in this story, this is most likely set in an alternate timeline created by Tannis. However, it is possible that when the Doctor used his powers to take Tannis out of time, he altered history so these events never occured.''

It accordingly comes from the DW website.