Alvin McKinley (portrayed by Connor Trineer) was a minor character in Terminator: The Sarah Connor Chronicles. He appeared in the Season 2 episode "The Good Wound".
Alvin was the head security guard at a hospital in Los Angeles. He was romantically involved with a doctor there, Felicia Burnett, but it seems that their relationship was an abusive one. During the episode, Sarah Connor is secretly being treated by Felicia for a bullet wound she sustained in the previous episode "Earthlings Welcome Here". While treating Sarah, Felicia asks her about her life, though Sarah is vague with her answers and Felicia is led to believe that Sarah is in an abusive relationship herself.
After Sarah calls on Derek Reese to destroy her car and any evidence that she was at the hospital, Alvin begins investigating. He begins searching the hospital and eventually finds the operating room where Felicia is treating Sarah. Derek is there too and both he and Felicia have guns raised. Alvin raises his own sidearm and tells Felicia to put down Sarah's gun. When Felicia doesn't respond, Alvin becomes angry and calls her "crazy bitch", indicating to the viewer that he is indeed abusive toward her. Before Alvin can finish threatening her, Felicia fires Sarah's gun. The camera shows that the bullet struck Alvin in the arm, but he nonetheless dies.