2.In fact, the photos of Fred that Mary looks through are actually real-life photos of Luke that his family provided.
3.Creator Roberto Aguirre-Sacasa said that "very early on" the writers decided to have Fred have a heroic death on screen.
4.As you can imagine, the episode was "incredibly hard to perform" for the entire cast and when they all arrived back on set for Season 4 it felt like they were all reliving Luke's death all over again.
10.During his time on Riverdale, Luke had talked about getting Shannen Doherty to guest star since Season 1, so having her in this episode was a way to honor his wishes.
11.Roberto thought having Shannen ultimately play the character Fred saved was perfect because "Luke cared so deeply about Shannen."
12.After filming the scene with Shannen Doherty, the cast took a "moment of silence to honor Luke."
13.Also during this scene, Lili revealed that there was a dog they would play with in-between takes — "Luke loved dogs so much."
14.Cole said Shannen felt very privileged to be able to share the "burden of Luke's passing" with a cast that loved him as much as she did.
15.And finally, Fred's death will continue to be felt throughout the entire season "especially around the Andrews house" — Archie will "struggle with grief and struggle with how to live up to Fred’s memory."