Brooklyn Nine-Nine: 10 Things You Completely Missed From Season One

10. Rosa Acts Differently In The Pilot

Rosalita "Rosa" Diaz is known for being the toughest cop in the 99th precinct. Considering her neighbours don't know her name, she's survived being buried alive, and has a motorcycle helmet for a heart (at least, according to Charles Boyle,) it's obvious she is one police officer you don't want to mess with.

However, Rosa was a little different when the show originally aired. Throughout the opening episode, she seems more inclined to indulge in Jake's elaborate pranks than she does in the rest of the show. Even though she is renowned for her stone-faced manner, she smiles and laughs a couple of times in the pilot.

However, the most noticeable difference is her voice. Instead of speaking in a deep, expressionless tone, the actress portraying her, Stephanie Beatriz, uses her own dialect, making Rosa sound more high-pitched and feminine.

To make her come across as more unhinged, her playful side was toned down and her voice was deepened in subsequent episodes. This was an excellent decision since Rosa's scenes were more impactful when she allowed herself to be emotional and vulnerable.