Doctor

The Doctor is a town role that has the ability to heal people from death during the dream in the Catacombs. If the target that you picked at nightfall is attacked, then you will save them from death. As Doctor, you should heal anybody that claims to be Officer, Investigator, Revealer, Guard or Scholar. But, you should be weary of double claims, depending on the amount of players in the server.

If there is known to be another Doctor or even a Guard, try to convince them to come out, and be on you, while you be on them. This is a great strategy for near-end games, if there's only you two and the last killing role left.