Medics provide medical treatment for Travelers who are injured during missions. They also provide treatment during other circumstances and ensure the general well-being of the team. Medics may take active roles in missions at the discretion of their Team Leader. As revealed in Kathryn, medics are required to have "a few doses" of medical nanites on-hand for problems that are not solveable with 21st century technology. Their usage generally requires authorization from The Director.