Doctor Who: 10 Unresolved Storylines & Mysteries That Need To Be Explored

10. Adam’s Infospike Aftermath

You daft sod Adam Mitchell. You were given the privilege of travelling into the future to enjoy the culinary delights of kronkburgers and beef-flavoured Slush Puppy; and then you went and spoiled it all by doing something stupid like taking the Doctor's "open your mind" suggestion all too literally.

After receiving a remarkably quick infospike procedure - creating an openable forehead - Adam goes all Magus by downloading the entire history of the human race and transmitting it via Rose's superphone to his parents' landline, some 198,000 years ago. His actions almost changed the course of history and royally pissed off the Doctor, who took him back to his parents like a naughty boy and strongly advised him to “live a very quiet life and keep out of trouble”, otherwise he may end up being dissected.

But in the comic series Prisoners of Time, we see Adam team up with the Master (who else?) to exact revenge on the Doctor by kidnapping and threatening to kill all of his companions. SPOILER ALERT! He eventually dies a noble death, with his headstone inscribed: Adam Mitchell - A Companion True.

Nevertheless, it would be funny seeing Adam in an episode having to navigate a large gathering of people finger snapping instead of clapping!