That episode is called party crasher. It is the 19th episode in the red vs. blue season 10. You can go to roosterteeth.com to see all the elisodes.
Episode 9 - The Blue eyed Demon
Episode 13 : "The Blue Spirit" .
Blue dies in episode 30 - titled "Wolf's Rain" .
Episode 6
The Season 2 Episode: Telling Time With Blue Season 1: Snack Time Season 2: What does Blue Wanna do on a Rainy Day Season 2: What does Blue Want to do with her Picture
Episode 44
episode 1
The episode was titled "The Earth King" and it is in Book 2.
in episode 18
In the episode prom wrecker
It happened in the "Midterms" episode.
Episode 1