The phrase "useful feature" in relation to most likely refers to a real-world safety tip discussed by fans regarding the Castle episode of the same name .
In real life, all mobile phones are required to allow emergency calls (911) without a passcode or active SIM card, provided there is a signal from any carrier tower nearby. Other Shows with "After Hours" (Season 5, Episode 8) [S5E8] After Hours
Fans often point out that the characters struggle with a found cell phone because they don't know the password. The phrase "useful feature" in relation to most
While Castle is the most common association for this specific query, other series also have an episode 5x08 with similar titles or themes: Power: Season 5, Episode 8 - Rotten Tomatoes Episode 8 - Rotten Tomatoes