"Einstein's time machine" is a title based upon conjecture.
Check the behind the scenes section, the revision history and discussion page for additional comments on this article's title.
was working on a time machine
when an accident brought him on board the Doctor's TARDIS
. He believed that, when constructed, it would be superior to the TARDIS. Einstein believed that he had developed bionic fusion liquid
, which he thought was the key to completing his machine. However, the Eleventh Doctor
informed him that the liquid
wasn't in fact bionic fusion liquid. (TV
: Death is the Only Answer