WARNING: The following contains spoilers for DC's Legends of Tomorrow Season 6, Episode 6, "Bishop's Gambit," which aired Sunday on The CW.
"Bishop's Gambit" picks up directly where "The Satanist's Apprentice" left off, with Sara Lance discovering that Bishop is a clone. She learns that he's different from the Ava clones because there will only be one of him at a time, with a backup ready to go in case anything happens. Bishop explains that he can easily clone himself or any other organic being because science in his time has made cloning a simple process. Sara is disgusted by his actions, knowing he could use his skills to do good, but Bishop believes he is doing the right thing by rebooting the human race. He then mocks Sara, stating that no one is coming to save her. However, at that moment, Mick Rory and Kayla finally arrive on Bishop's planet, ready to bring Sara back.
Meanwhile, back at Constantine's, the team moving in is proving overwhelming for the former master of the dark arts. A still hopeful Ava manages to connect Gideon to an old TV, hoping to find clues about Sara's location. Gideon discovers an alien massacre in a psychiatric ward in 1956, and while Ava is relieved to have a lead, Gideon reveals the alien went by the name "Sara Lance." The team meets and discusses a plan, with Astra suggesting bringing the alien back to Constantine's to question it. Ava agrees and the team couriers to 1956 and are surprised to meet Amelia Earhart. However, Spooner can't get an alien reading off of her, making the situation odd. Regardless, they bring her back to Constantine's and dress the place to look like an asylum to try and get answers without provoking her into a murderous rage.
Behrad and Spooner team up to talk to her, with Behrad taking the good cop approach and Spooner going full bad cop. They fail to get any answers, though, as Amelia is on anti-psychotic drugs, making her state of mind unbalanced. Spooner, wishing to speed up the process, secretly puts caffeine pills in Amelia's tea, which ends up working as a rambling Amelia reveals she left her ship in New York. Nate and Ava assume it's a pod, and so they race back to 1956, only to find the Waverider. Ava hoped Rory came back with Sara, but after not getting a response, she storms back to Constantine's and interrogates Amelia, demanding to know where Sara is. This ends up waking up the alien inside Amelia, but when she goes to attack Ava, she's stopped by Behrad and Spooner, who subdue her with tranquilizer darts.
With Amelia's alien form awake, the team needs a new plan to extract information from her. John suggests a spell that can extract memories a person tries to hide, even from themselves. John is powerless following the last episode's events, though, so he tries to hide this secret by suggesting Astra take a swing at the spell under the pretense of practicing her magic. They bring Amelia to the Waverider and strap her down, hoping to use the ship's defenses as a precautionary measure in case anything goes wrong. Astra readies herself and casts the spell, seeing images of the real Amelia's memories. She finds out that while Amelia was traveling across the world, she was abducted by the same beam that took Sara and, after escaping, took refuge on Bishop's planet. Astra also finds out that Sara met Amelia, but her memories are scrambled, making it difficult to read them. Ava asks Astra to push through, but this unlocks the full alien form, which escapes from the straps and attacks Spooner, who screams back at the alien in its own language. John starts to stress over what he's done to Astra as Zari walks in and questions him, knowing something is up.
This course of events horrifies Spooner because she thinks she has the potential to turn into a horrifying alien like Amelia did. While Behrad tries his best to comfort her, Spooner's ability to understand and speak the alien's language worries her, mostly because her powers have gotten stronger and more refined since joining the Legends. Behrad helps Spooner by letting her know that as a Legend, the past and the future are not important; what is important is the present moment and what a Legend does with it. This helps Spooner, who uses her newfound ability to talk to the alien. She learns that Amelia did kill Sara, or at least believes she did. Amelia then attacks Spooner and is about to kill her before Ava comes in with the save. It's at this point that Spooner lets Ava know that Sara is dead, which breaks Ava's heart.
Back on Bishop's planet, Kayla discovers that her ship lacks a power cell. They then notice a trooper by Kayla's ship, so Mick goes to get some answers. He is shocked to find out the trooper is an Ava clone and decides to get apprehended with Kayla, seeing this as an advantage. Unfortunately for Kayla, Amelia Earhart steals the ship, leaving her without a backup plan. Meanwhile, Sara finds a camera in her hospital room and covers it. But just as she does, Gary emerges from the toilet and lets her know he found the power cells. Sara tells him to get to the ship while she finds her own way out by playing along with Bishop's game. She manages to get Bishop to lower his defenses by agreeing to help him, which leads to him inviting her to dinner to celebrate. Outside, Kayla finds the power cells and tries to figure out how to steal one. Suddenly, her ex-fiancé, Gary, stumbles to the cells, trying to sneak his way past an Ava trooper. Kayla uses this as an opportunity and loudly yells that there's an intruder. The Ava troopers find Gary and take him away, which leaves the power cells unguarded.
Bishop is then informed of Mick's capture and is upset that someone came to rescue her, believing that Sara has joined his side and is no longer in need of rescuing. He decides to take care of Mick by lowering the barrier that protects humans from the atmosphere of the planet, hoping it will kill Mick and any other intruders on the planet. His Ava assistant protests that her clone sisters are also outside and would die if the barrier was brought down, but Bishop brushes her off, stating that all the Avas are replaceable. As the barrier starts to lower, the soldiers tie Mick to a tree and leave him to die. But a quick-thinking Mick manages to break out and uses a breathing mask to buy some time. While Mick manages to save himself, Gary walks into the facility carrying an Ava trooper. The Avas inside recognize him and believe he killed again, but the trooper informs her sisters that he saved her. Gary then apologizes for eating D-Squad and tells them about his Ava, a leader with a kind heart. Back outside, Mick finds a dying Kayla on the floor with a power cell, which is too heavy for him to carry alone. He gives his breathing mask to Kayla and they share it, hoping to survive for as long as it takes them to get back to her ship. When they arrive, however, they are bombarded by locals trying to break into the ship. When attacking them fails, Mick and Kayla lock themselves into a pod to stay safe. This allows the duo to bond, and before long, they're hooking up.
Sara and Bishop start off their dinner with some champagne, happy to be on the same side. But Sara notices the storm outside, which is when Bishop lets her know that Mick came to save her but is most likely dead. Angry, Sara beats Bishop unconscious and drags him to a lab where she discovers his backup body. Sara then denounces Bishop's cloning way of life, believing wholeheartedly that every scar on her body, every death, every injury is a lesson from life. Bishop curiously mentions that he cannot see a single scar on her body, despite her many years as a vigilante and assassin. At this moment, it becomes clear to the audience that Sara Lance, the person they followed from her first step on the Queen's Gambit to the moment she first met Bishop, is dead, and the one standing in the lab is a clone.
DC's Legends of Tomorrow stars Caity Lotz, Dominic Purcell, Nick Zano, Tala Ashe, Matt Ryan, Olivia Swann, Jes Macallan, Adam Tsekhman, Shayan Sobhian, Lisseth Chavez and Raffi Barsoumian. Season 6 airs Sundays at 8 p.m. ET/PT on The CW.