Red-haired actresses: Alona Tal, Lori Lively.
Up until episode 14, every episode title besides the pilot contains the word "Red" in it symbolizing Red John, the serial killer who killed Jane's family. That being said, crimson is a shade of red.
Sasha Roiz [Keith Wolcutt] and Melinda Page Hamilton [ Katie] were both in the same episode of Grimm.