- "You know, it's from Bunker Hill. Remember that one? It's the one where the Brits, uh, thought they had won, but the battle ended up so bloody, that it cost them the war, and it wasn't worth it."
- —Ben Lockwood to Manchester Black on his grandfather's bayonet
"Bunker Hill" is the eighth episode of the fourth season of , and the seventy-third episode overall. It aired on December 2, 2018.
|Nia has a powerful dream about Agent Liberty, but refuses to look at it as a prophetic dream and pushes it aside. After noticing something is bothering Nia, Kara enlists Brainy’s help and the two try to persuade Nia to embrace her destiny. Meanwhile, Manchester Black pays Ben Lockwood a menacing visit.|
- Melissa Benoist as Kara Danvers/Supergirl
- Mehcad Brooks as James Olsen
- Chyler Leigh as Dr./Director Alex Danvers
- Katie McGrath (credit only)
- Jesse Rath as Querl Dox/Brainiac 5
- Sam Witwer as Professor Ben Lockwood/Agent Liberty
- Nicole Maines as Nia Nal
- April Parker Jones as Colonel Lauren Haley
- David Harewood as J'onn J'onzz
- Bruce Boxleitner as President Phil Baker
- David Ajala as Manchester Black
- Sarah Smyth as Lydia Lockwood
- Roxy Wood as Yvette
- Josh Chambers as First Local
- Jeffrey Chivers as Col #1
- Timothy Lyle as Frank
- Jaymee Mak as Mackenzie
- Jill Morrison as Second Local
- Tawny West as Reporter
"Bunker Hill" begins with Nia having a bad dream of sorts — she has powers that permit her to witness things before they while dreaming. At work, Kara stands up to Nia about deceiving everybody at Thanksgiving about having narcolepsy.
Ben Lockwood gets back to his significant other advising him regarding a previous school cohort appearing. It's uncovered Manchester Black showed up to the house to hurt Lockwood. J'onn utilizes his clairvoyant connect to caution Manchester not to do anything. Lockwood's significant other leaves the room and Manchester threatens to use a firearm out on Ben.
Kara shows up to Nia's home to converse with her about her forces. There, Nia uncovers she's from a planet called Naltor. Kara brings in Brainy, who additionally uncovers he's an outsider. There, Brainy's ready to utilize his forces to send Nia to her fantasy state, where she keeps on observing the lady in torment from prior.
Nia awakens and advises the gathering they have to go to Collinwood High School since that is the place the pained lady is.
Back at the Lockwood living arrangement, Manchester has now hauled a knife out, holding both of the Lockwoods prisoner blaming Ben for being Agent Liberty. J'onn attempts to stop Manchester through clairvoyant methods once more, yet he's ineffective.
Nia shows up at Collinwood with Kara and Brainy and we see one of the other Liberty operators with an outsider sniffing hound. Kara in a split second gets his character and understands he's with two different specialists. Kara devises an arrangement where she deals with the operators while Brainy occupies Nia. Kara thinks in the event that they capture her, they could lead her directly to the lady in a tough situation.
Kara approaches the gathering and a van pulls up to toss her in. Nia looks down the road and notification the uproar. She runs back and Brainy is compelled to follow. The specialists hijack every one of them three and take them to the operators' fort.
There, the operators get anxious and have a go at shooting Nia, who sees the occasion coming. She's ready to utilize the projectile shot to break her out of the cuffs and she enables the other two to out. Disorder results in spite of the fact that the trio can rapidly curb the specialists.
Ben takes Manchester and his better half to the cellar of the Lockwood home and Ben uncovers to his significant other that he is, actually, Agent Liberty.
Kara does some exploring and acknowledges they're at Lockwood Family Steel. The trio rapidly attracts a line to Ben Lockwood being Agent Liberty and Kara calls Alex to check whether she can affirm. Alex has a Child of Liberty in care and after a brisk cross examination, he affirms that Lockwood is Agent Liberty.
Manchester makes Ben suit up in his Agent Liberty ensemble and fires pummeling him for being behind the homicide of Fiona. J'onn utilizes his clairvoyance again and Manchester says the main way he'll stop is if J'onn murders him. J'onn cannot. Manchester and Ben proceed with their battle and Ben inevitably busts through the tempest entryway, driving Manchester on a pursuit.
Kara leaves the steel processing plant to support Manchester, yet she experiences difficulty finding them since they're no longer at the Lockwood living arrangement.
Brainy and Nia begin examining the production line itself and Nia understands that this spot is, indeed, the area from her fantasies.
Ben drives Manchester directly to the steel manufacturing plant. Manchester's going to shoot Lockwood when Kara flies in and stops him. The two discussion over murdering Lockwood. In the long run, Manchester can pour nth metal on Kara, sticking her to the floor.
Lockwood's significant other shows up and occupies Manchester. Ben's almost going to execute Manchester when Supergirl breaks free and stops him, sparing Mrs. Lockwood from plunging to her demise all the while. National City police show up to capture Lockwood and Manchester for their wrongdoings.
Kara flies back to the DEO and is amazed by the nearness of President Baker. There, he educates Kara that she needs to put her nation first and uncover her mystery personality. Kara will not uncover that data and Baker diminishes her from DEO obligation.
Enormous fights with regards to Lockwood start to shape outside of the nation prison and CatCo Media.
The scenes closes with the Monitor murdering the entirety of the legends on Earth-90. The Flash from Earth-90 manages to get away.
- In her nightmare, Nia is watching the 1959 film North by Northwest.
- After Frank says that he is Agent Liberty, Brainy compares the situation to the 1960 film Spartacus, in which a group of soldiers show their loyalty to the titular character by not letting him turn himself over, but all claiming to be Spartacus.
- When Nia, Kara, and Brainy visit Collinwood, the former compares the deserted streets to the 2013 film The Purge.
- Manchester calls Supergirl "Pollyanna", referencing the book series of the same name.
- After swinging a hook to stop Manchester, Brainy mentions the 1991 film Hook.
- When guiding Nia through her dreams, Brainy accidentally calls her "Nura". This is a reference to Nura Nal, a member of the Legion of Superheroes in the 30th and 31st centuries, known in the comics as Dream Girl.
- Nia Nal has been confirmed to be Nura's ancestor in the Arrowverse.
- The episode ends with the cold open from the crossover "". Unlike the rest of this episode, this scene was directed by Tom Cavanagh.
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