Could Castle Season 5 get any better? From uncovering the identity of “the Dragon” to Ryan and Esposito reuniting, and every Caskett glance and handshake in between, Castle fans are definitely shouting their approval.

But the ultimate storyline radiates from Castle and Beckett, and when everyone else will find out about their not-so-secret secret relationship.

While we wait for the rest of the characters to play catch-up, here’s a recap of who does know, in case you want to test your skills.

1. Martha Rodgers — Season 5, Episode 3: “Secret’s Safe With Me”

Nothing gets by Martha Rodgers, except maybe that long-awaited acting re-debut on Broadway. But when it comes to Castle and Beckett, she has this one in the bag.

While Martha and Castle help Alexis pack for college, she tells her beloved son that she knew Beckett was hiding in Castle’s closet when she burst into his bedroom to find him wrapped only in a comforter. Stunned, Castle is virtually speechless, probably because he went through so much trouble trying to sneak Kate out of his loft, undetected.

Sorry, Castle, but this woman knows every trick in the book. Maybe the apple doesn’t fall far from the tree. But someone chucked the apple when Alexis was born. 

2. Alexis Castle — Season 5, Episode 3: “Secret’s Safe With Me”

Martha asks Castle if he’s going to tell Alexis about his relationship, since she is headed off to college. We aren’t witness to the actual conversation, but Castle recounts the details of what happened to Beckett, who is far less than thrilled that he told her. What really hurts Castle the most, though, is that Alexis doesn’t seem to care. Castle is led to believe that maybe she doesn’t like Beckett, but our favorite redhead sets the record straight that she’s just going to miss having her dad around all the time.

3. Detective Ryan — Season 5, Episode 4: “Murder, He Wrote"

Ryan goes from 0-60 in 2.5 seconds during his questioning of suspect Aaron Lerner. That is, until he’s thrown for a loop after finding out Castle isn’t alone up in the Hamptons. He completely switches directions on the interrogation and demands to know who is with Castle. Aaron blurts out, “Kate!” and you could see Ryan’s mind connecting all of the dots.

But it doesn’t end there. Ryan takes it one step further and opts to dangle this newly released intel in front of the couple via a phone conversation. Ryan doesn’t give up all of what he knows, just that he interviewed Lerner, and he told Ryan “everything.”  

Caskett are only left to assume the Ryan might know. You know this will make for some hilarious scenes in upcoming episodes!


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