William Telfer was a crewman who served on the Federation starship USS Voyager.
A hypochondriac, Telfer habitually avoided assignment on away missions by getting The Doctor to declare him unwell and thus unfit for away mission duty. Commander Chakotay , who, as Voyager's first officer, had the duty of rostering crew duty assignments, put it very succinctly when he once remarked with annoyance that Telfer never went on away missions because he "always seems to get a note from his doctor."
Among his crewmates, he was especially close to a Bajoran crewman named Tal Celes . He frequently helped her perform her work as an astrometrics sensor analyst, which she found very difficult due to competence issues.