YMMV / Angel S01 E09 "Hero"

• Complete Monster: Tiernan and Trask are leaders of the Scourge, a group of purebred demons who believe themselves to be the Master Race. In their campaign against those they deem inferior, the Scourge eradicate every man, woman, and child they can find, wiping out entire clans of demons in pursuit of their agenda. Upon tracking down the Lister demons to Los Angeles, Trask leads his troopers in finding them, setting fires in the streets to lure them out of hiding and recruiting Angel when he proves his mettle by snapping Doyle's neck. When a human gives them the location of the clan, Tiernan vaporizes him with the Beacon, then has Trask place it on the ship so as to wipe out all humans and demons in a quarter-mile radius, all of which is merely the start of a genocidal campaign to wipe them all out entirely.
• Harsher in Hindsight: Doyle got a heroic send-off, but behind the scenes, Glenn Quinn didn't. He was booted off the show earlier than they'd planned because of substance abuse issues. And the Tragic Keepsake he records at the beginning of the episode gets all the more tear-jerking when you learn that Quinn's problems contributed to his death a few years later.