10 Doctor Who Characters Nobody Wants To See Return

10. Adam Mitchell

First appearing in 2005's Dalek as a wannabe space traveller working under the guy with the worst moustache ever (Henry van Statten), Adam Mitchell was designed to be a character nobody wanted to see ever again. He excelled in fulfilling this brief, and then some.

Adam (and then-current companion Rose Tyler) immediately hit it off, with a budding romance developing between the pair. At Rose's insistence, Adam joins the TARDIS crew and travels with them to spaaaaaace, but issues begin to arise when his greed gets the better of him, and he decides to install a USB port in his head.

Yeah, he's an idiot.

Adam never really gels with the Doctor or Rose, and comes off as an awkward and unwanted addition to a great TARDIS duo. But again, that was the point.

He's then banished from the TARDIS by an absolutely fuming Ninth Doctor, and, much to the delight of fans everywhere, he hasn't been seen since.