"Tumour alien" 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.
A tumour alien
was a grey, blob-like parasite
that attached itself to its victim's brain
, causing symptoms that could be mistaken for Alzheimer's disease
, eventually killing
them. If it was disturbed, then it released a toxic gas. One passed through the Cardiff Rift
and attached itself to Katie Russell
. When she was operated on, it killed all of the surgeons
, along with Katie. (TV