How many Troubles we got going around now?At least there's no one exploding this time around.
- Cullen Rutherford - morphine in his blood, can infect other people through saliva and other bodily fluids.
- Donna Noble - Reliving time periods or being in two places at once. Could potentially be splitting. This one is hard to pinpoint.
- Will Scarlet - Literally heartless and feels nothing because of it, spreads that to those around him.
- Chris Traeger - "Infects" other people with his emotions.