Baltimore, Maryland

is the location for the following vignettes:
 * Sociopath
 * Living Word
 * "Vigil"
 * Vigil 2
 * Vigil 3
 * Vigil 4
 * Vigil 5
 * Vigil 6
 * Vigil 7
 * "Therapeutic Policy"
 * Vigil 10
 * Vigil 11

Baltimore is also the location of episode 4x02 "Five Autopsies".

Johns Hopkins Medical Center (where Madeline Frost works) is located in Baltimore.