59. In “Rise,” Captain Victoria “Iron” Gates takes over the squad, but the really big news is that Castle doesn’t think Beckett remembers him say he loves her even though she does. The episode’s biggest chill moment has to be when Alexis and Martha go after Josh when he blames Castle for what happened to Beckett.
60. In “Heroes & Villains,” Beckett tells a good cop that she has someone who cares about her. She warns this person to not be so driven by the past that she throws away the future. If only she’d follow her own advice.
61. The concept of cryogenics is the focus of Season 4’s “Head Case.” Castle wonders if two deceased parties will reunite in the future. Beckett says, “That’s what the great love stories are about, right? Beating the odds.”
62. In “Kick the Ballistics,” the gun Ryan had taken from him by the Triple Killer is used for a murder. The case makes Castle realize he truly doesn’t know what it’s like to be a cop. He takes on a restrained demeanor while still helping to solve the case. At the end of the day, the team gives a poignant toast to honor one of their own: Detective Kevin Ryan.
63. Sexy insurance investigator Serena Kyle lets Beckett know that she doesn’t steal things that belong to someone else. She’s speaking of Castle, who was caught in a lip-lock with Serena all for the good of solving the case, of course.
64. When a paranormal activity expert is found dead in “Demons,” Castle gets absolutely giddy when Beckett tells him “I ain’t afraid of no ghosts.”
65. The best moment in “Cops & Robbers” had to be when an undercover Beckett secretly clutches bank hostage Castle’s hand to him know that she’ll get him out of this. The second best moment had to be when Beckett promises to put a bullet through the bad guy’s skull if he hurts Castle. She’s an excellent hostage negotiator.
66. In “Heartbreak Hotel,” Castle, Ryan and Esposito dress up as three kings—as in three Elvises. Uhh, thank you. Thank you very much.
67. Esposito helps Beckett through a bout of PTSD in “Kill Shot.” He shows her the rifle that was used to shoot her. Esposito says she should embrace what happened and use it to give her strength. This little talk is just what Beckett needed.
68. Some “gimme a break” banter from “Cuffed”:
Beckett: They both want to be together but neither of them wants to admit to it.
Castle: Why do people do that to themselves?
Beckett: Maybe they just don’t see it.
Castle: How could they not? It’s so obvious.
69. Ryan is getting married in “Till Death Do Us Part.” As fate would have it, Castle and Beckett are dateless come the big day. So they walk down the aisle together…for someone else’s wedding, of course.
70. In “Dial M for Mayor,” Castle gets a call from the mystery man who first contacted him in “Rise.” He’s told that powerful people will come after Beckett if she continues to look into her mother’s murder’s case. It’s up to Castle to keep her out of harm’s way.
71. In “An Embarrassment of Bitches.” Castle shows Beckett how a cute dog likes to be rubbed by making circles with his thumb on the back of her hand. It starts out as a perfectly innocent moment, but the look the two of them share lets us know this hand-holding exercise stirred some feelings inside.
72. It’s a trip back to the 1940s in “The Blue Butterfly.” Songbird Betsy Sinclair (who looks a lot like Lanie) wows the crowd at the Pennybaker Club. But the best moment of the episode comes when Vera Mulqueen asks Joe Flynn to tell her he loves her. He responds, “Always.” They share a passionate kiss before heading off on their future together. Castle was right. It’s the stuff dreams are made of.
73. We meet Castle’s inspiration for Clara Strike in “Pandora.” She’s a smart, sexy CIA operative named Sophia Turner. She has a special bond with Castle, who alleviates any concerns Beckett may have about this. He says, “She isn’t my partner. You are.”
74. In “Linchpin,” Castle and Beckett survive a scary moment in a submerged car. They learn Sophia is a double agent before literally saving the world from certain destruction. But the biggest moment for Castle comes when Sophia reveals his unknown father had a connection to the CIA. Was papa Castle a spy?
75. Fairy tales are front and center in “Once Upon a Crime.” Our favorite moment was a subtle shout-out to The Princess Bride. When Beckett asks Esposito to check out a lead, he responds with a simple “as you wish.”
76. Lanie reveals she once wanted to be a prima ballerina in “A Dance with Death.” Her plans changed when she felt the world wasn’t ready for such a top-heavy dancer.
77. In “47 Seconds,” Castle learns that Beckett remembers everything about the day she was shot. That means she knows about his “I love you.” The emotionally draining episode ends with Castle becoming somewhat detached with his somewhat confused partner.
78. In “The Limey,” Beckett orders a handsome Scotland Yard man to reach for the sky as the guy’s towel drops to the floor. Castle tries to cover Beckett’s eyes, but his partner still sneaks a peek at her naked prey.
79. Castle teams with a tough homicide cop named Ethan Slaughter in “Headhunters,” The guy is scary. Still, Castle decks Slaughter when he makes an indecent remark about Alexis. Never mess with a mystery man when it comes to his daughter.
80. There were lots of cool zombie moments in “Undead Again,” but it’s the one that tugged at our heartstrings that was most memorable. Alexis is upset when a laser tag game she’s been playing with her dad since she was five ends. She’s growing up and moving away to college. Thankfully, she’s staying local at Columbia.
81. In “Always,” Castle and Beckett finally, finally, finally get together. ‘Nuff said.