That episode was completely unnecessary.
I don't know if Perry is Saxon or not but I'm going to stick with Jane killing him when she sees Perry abusing Celeste. After I talk this out, yeah Perry is Saxon. The murder scene will be Jane walking up to see the abuse, then we'll see that flashback scene they've showed the last five episodes, then Jane will cap Perry.
The only mysteries I have are who is hurting Anabella and whether Ed will find out about Madeline's tryst. Theatre guys wife killing Madeline is my fall back murder theory.