- See Gallagher for other articles with titles that contain, either by relationship or by coincidence, this character's surname.
Gallagher was brawny, athletic, and young in 2268.
En route to Alpha Maluria VI, to help avoid leaking a secret about Kirk's son David Marcus, Leonard McCoy was avoiding Kirk by hanging out in the ship's gymnasium. During one trip there, Kirk accompanied him, and McCoy had to pretend that he was wrestling. He chose Gallagher as his opponent because he was slightly smaller than two others nearby, and Kirk left before the fighting began. Gallagher was nervous about harming the doctor, but McCoy went through with the bout anyway. (TOS novel: Faces of Fire)