- "Sara? Is it possible that our fugitive killer is a possessed doll?"
- "Horror movie 101."
- —Ray Palmer and Sara Lance
|With Rory and Ava at odds, Sara tries to come up with a way for them to get along, but all is put on hold when a new magical creature attacks the Legends. Constantine is forced to confront his tragic past but it could have devastating consequences for the rest of the team. Meanwhile, Mona has a crush on someone she works with and gets some advice from Nate.|
- Brandon Routh as Dr. Ray Palmer
- Caity Lotz as Captain Sara Lance
- Maisie Richardson-Sellers as Charlie
- Tala Ashe as Zari Tomaz
- Jes Macallan as Director Ava Sharpe
- Amy Louise Pemberton as Gideon (voice)
- Ramona Young as Mona Wu
- Nick Zano as Dr. Nate Heywood and Charlie
- Dominic Purcell as Mick Rory/Heat Wave
Special appearance by
- Adam Tsekhman as Agent Gary Green
- Christian Keyes as Desmond
- Joyce Guy as Marie Laveau
- Darien Martin as Konane
- Jason McKinnon as Charlie (as F. Scott Fitzgerald
Special appearance by
- Ronald Selmour as Xavier
- Katrina Reynolds as African Female Slave
- Gwenda Lorenzetti as Queen Elizabeth II
- Mia Bella as Little Girl
- Wolsey Brooks as Mysterious Agent
- Vesna Ennis as Garima
"Hell No, Dolly!" begins with a fix of Constantine having dreams of a man he's met. He's out of nowhere woken up by Charlie and we see that the two are drinking on the Waverider.
In the kitchen, Ray divulges that he's grown a mustache subsequent to perusing a letter from Nora saying she loves mustaches. Beam's perusing realities about a sequential executioner from the rear of an oat box and Ava says the realities aren't right since she's knowledgeable in many executioners. Gideon then tells the gathering there's been a chronological error in New Orleans 1856.
The group chooses to go back to New Orleans trying to spare the casualties before they're killed. While there, Constantine continues having dreams like the ones he was dreaming and notices that he feels off. Constantine goes down one of the side avenues and is obviously medicated by a spectator.
Constantine awakens and discovers he's been abducted by Marie Laveau and her men since Constantine's in control of one of her talismans. Constantine has another vision of a past sweetheart and the beau blessings him the talisman Laveau needs. Laveau uncovers the man is one of her far off family members.
Sarah, Ray, Ava, and Mick are at an evening gathering marking out one of different casualties, attempting to get a brief look at the future aggressor.
Charlie and Zari bust in to where Constantine is being held.
Beam's chasing after a dubious individual at the gathering when he hears a youngster crying. He goes into a room and the young lady makes reference to that the doll she's holding is going to murder her mother. As Ray's taking a gander at the doll, another doll sneaks up behind him and takes him out with a scoop.
At that point, Laveau educates Zari that the chronological error is an abhorrent soul, and she transfers that data to the remainder of the group. Sara busts in the discover Ray oblivious and the had doll jumps at her with a blade. She stops it and Mick burns it with his warmth weapon.
Constantine offers to give Charlie her forces back in the event that she ventures out with him to introduce day to ensure he doesn't meet his sweetheart. Laveau requested him to spare her kinfolk in return for help in 1856.
Sara and Ava return the consumed doll to the Waverider and chain it up. As they leave the room, we see the doll close its hand.
Constantine and Charlie head back to 1856 yet Constantine despite everything has dreams, demonstrating that their arrangement fizzled. They take a stab at returning to 2018, however Zari restricts them believing they're looking for trouble. Back on the Waverider, Constantine discloses to the two that they have to prevent him from meeting Desmond in light of the fact that after they meet, an evil presence named Neron begins following Constantine.
At the Time Bureau, Mona discovers that the werewolf they're holding has been harmed by a kindred operator and she begins succumbing to him. The wolfman pushes Mona aside since he smells specialists coming. The operators remove him.
We see the doll's mouth open and a translucent being exits out of the mouth. The soul drifts by Zari, who doesn't see it and it passes Ray in the lobby, who likewise doesn't see it. The soul sneaks into one of the cases in the load narrows.
Sarah makes a dish for supper, welcoming Ava and Mick together to take a stab at reviving their kinship. Their supper self-destructs when the two continue battling, inevitably overflowing when Mick says something about Ava being a clone. Sarah and Ava notice some unfilled flour and see little strides, demonstrating that the doll is back alive.
Constantine comes back to 2018 and uncovers that Neron isn't the person who sent Desmond to hellfire. Or maybe, Constantine had to under coercion.
Ava and Mick go over the insidious soul, which has had the ventriloquist doll of Professor Stein. It's going to cut Ava when Mick stops him. The doll gets away.
Mona attempts to spare the wolfman yet she by one way or another figures out how to stop time all the while, freezing everyone.
Preparation ran from September 5 until September 18, 2018. Shooting ran from September 14 until September 26, 2018.
- The episode's title is a reference to the musical Hello, Dolly!.
- Former Legends series regular Victor Garber (who portrays Martin Stein in the Arrowverse) departed the series prior to the mid-Season 3 finale ("") at the time he was cast in Hello, Dolly!.
- This episode marks the reappearance of Leo Snart's puppet of Professor Stein, which hasn't been seen since "".
- A Sailor Doll is seen attacking one of the Legends with a knife which is a reference to serial killer doll named Chucky.
- Sara refers to it by saying "I think we may have a Chucky situation here." when she means that the Dybbuk is in a doll. She also refers to it again later, saying "One thing I learned from the Chucky movies is the doll always comes back."
- The sailor outfit could also be a reference to Robert the Doll, a haunted doll which was also an inspiration for the Child's Play series.
- In Jewish mythology, a dybbuk is a malicious possessing spirit believed to be the dislocated soul of a dead person. It supposedly leaves the host body once it has accomplished its goal, sometimes after being helped.
- The Emmy-nominated portrayal of Marie Laveau by actress Angela Bassett that Gideon mentions is a reference to Bassett's role as Marie Laveau in American Horror Story.
- A running gag of Ray's mustache being half-removed and grown back parodies former Superman actor Henry Cavill who was sporting one for his role in Mission Impossible: Fallout while filming the Justice League re-shoots before it was digitally removed in the editing process.
- The name of the demon hounding Constantine is revealed to be Neron who first appeared in Underworld Unleashed #1 in 1995; Neron is one of the more infamous players in DC Comics' cosmology. A demon-lord who can't resist making Faustian bargains with mortals, Neron once tried to take over the universe by gathering a mass quantity of souls, which are the currency of Hell and the source of his power. Neron approached numerous super-villains, then numerous superheroes, offering them their hearts' desire in exchange for their souls, all while plotting a way to acquire the purest soul on Earth - an object that would make Neron all-powerful! Though his scheme was ultimately thwarted, Neron has remained a power to be reckoned with in the DC Universe, always ready to make a deal with anyone desperate enough to seek his help and pay his price.
- Nate is not seen during the temporal explosion caused by Constantine; however, the promo for the next episode shows him as a prime victim of the new timeline.
- Before the start of the season, Mona was originally promoted as having wolf-like powers, but this might still take place because of her injury from Konane.
- Marie seems less knowledgeable about magic than John, who is always correct about how it works.
- At 7:33 Ray says "Laissez les bons temps rouler!" ( "Let the good times roll!" ) which is often heard in New Orleans.
- Ava mentions that she has a hobby of reading about serial killers, and when asked about the quiz on the box of Big Easy O's cereal (Who is the most prolific serial killer in the United States?), Ava says that the correct answer is Ted Bundy, but that in her opinion, John Wayne Gacy had more victims than he confessed. In reality however, John Wayne Gacy (with 33+ victims) had more confirmed victims than Ted Bundy (who confessed to 30 killings, though his total body count is unknown).
- Furthermore, in real life, at the time that this episode first aired, Gary Ridgway (who wasn't listed as an option in the quiz, and has been convicted of 49 murders but confessed to 71 killings) was credited as the most prolific serial killer in the United States. That title went to Samuel Little, though he hasn't been convicted of all the murders he's suspected to have committed (having been convicted of 50 killings, but claims to have killed 93 victims; though he's suspected to be linked to more).
- When Gideon briefs the team about the changes to the timeline, Sara has just one hand on her coffee mug. In the next shot, the mug is in both hands.
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