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- "We didn't screw things up for the better this year. We screwed things up for the more magical."
- —Nate Heywood[src]
The fourth season of premiered on October 22, 2018 on The CW and concluded on May 20, 2019. It consisted of 16 episodes.
|After defeating the demon Mallus by cuddling him to death with a giant stuffed animal named Beebo, the Legends are ready to ease off the gas. Sara and her team join Ava Sharpe and the Time Bureau to help clean up the last few remaining anachronisms. The job seems straightforward enough until Constantine arrives to inform them that, in solving one major problem, they have created another, much larger one. When the Legends let time crumble in order to release and defeat Mallus, the barrier between worlds softened. History is now infected with "Fugitives" – magical creatures from myths, fairy tales, and legends. Having been expelled throughout time by people like Constantine, these Fugitives are now returning to our world in droves and making a real mess of things. As the Time Bureau is distrustful of and ill-equipped to deal with magic, the Legends must team up with everyone's favorite demonologist to set history back on track.
Sara and Constantine are joined by compassionate inventor Ray Palmer, hotheaded ex-con Mick Rory, rebellious totem-bearer Zari, and heartbroken historian-turned-superhero Nate as they set out to save the world – and their legacy. It's the familiar fun of the Legends time-traveling across historical events and encountering famous figures with an added shot of magical craziness!
- Brandon Routh as Dr. Ray Palmer/The Atom and Neron
- Caity Lotz as Captain Sara Lance/White Canary
- Maisie Richardson-Sellers as Charlie
- Tala Ashe as Zari Tomaz
- Jes Macallan as Director Ava Sharpe
- Courtney Ford as Agent Nora Darhk/Fairy Godmother
- Amy Louise Pemberton as Gideon
- Ramona Young as Mona Wu
- Nick Zano as Dr./Agent Nate Heywood/Steel
- Dominic Purcell as Mick Rory/Heat Wave
- Matt Ryan as John Constantine, Neron, and Konstentyn
- Adam Tsekhman as Agent Gary Green
- Tom Wilson as Hank Heywood
- Susan Hogan as Dorothy Heywood
- Jordyn Ashley Olson as Prudence Hawthorne
- Jane Carr as Tabitha/Fairy Godmother
- Christian Keyes as Desmond and Neron
- Darien Martin as Konane
- Natalia Vasiluk as Baba Yaga
- Anthony Moyer as "Chupi"
- Vesna Ennis as Garima
- Daniel Cudmore as Unnamed minotaur
- Paul Reubens as "Mike the Spike" (voice)
- Sisa Grey as Wolfie
- Gracelyn Awad Rinke as Young Zari Tomaz and Young Zari Tarazi
- Olivia Swann as Astra Logue
- John DeSantis as Frederic
|#||Episode name||Directed by||Story by||Teleplay by||Original airdate|
|1||""||Gregory Smith||Phil Klemmer & Grainne Godfree||October 22, 2018|
|After the Legends defeated Mallus and wiped the final anachronism from time, they find themselves in unfamiliar territory with the Time Bureau. All that changes when Constantine informs Sara of a new magical threat that leads the team to Woodstock. Constantine thinks he knows how to defeat the new threat, but will need the help of the team and their special klepto talents to help with his spell. Meanwhile, Nate and Rory go on an adventure leaving Nate facing someone from his past.|
|2||""||Kevin Mock||Keto Shimizu & Matthew Maala||October 29, 2018|
|When the magical Time seismograph goes off, the team finds themselves headed to the Salem witch trials. Sara notices that Zari is taking this case personally when she promises to save a mom, who is being accused of being a witch. However, the team quickly learns that there is a magical creature in the town creating problems they hadn't been expecting. Meanwhile, Nate and Ava work together to try to keep their Time Bureau funding by proving to them that Magic exists.|
|3||""||Kristin Windell||James Eagan & Morgan Faust||November 5, 2018|
|When the Legends discover a fugitive is hiding in 1970's London, they realize he is part of a gang that is targeting the British Monarchy. Trying to stop the gang, they realize someone from the Legends must infiltrate them. Surprising everyone, Ray is the one to gain their trust after he is put through a series of tests with help from Sara and Rory. Meanwhile, Gary shows Nate the ropes at the Time Bureau, but it turns out to be anything other than an ordinary day at the office.|
|4||""||David Geddes||Ray Utarnachitt & Tyron B. Carter||November 12, 2018|
|When the Legends discover that kids at a summer camp have disappeared, Sara, Ava, Ray and Constantine find themselves as the new camp counselors. At camp, Ava struggles to get along with the kids, but Constantine whips up a potion that helps Sara and Ava bond with the children. Luckily, the team finds clues to the whereabouts of the missing kids, but the battle to save them leaves one member in bad shape. Meanwhile, Rory and Zari are tasked with watching the fugitive and Rory finds a kinship with their "prisoner."|
|5||""||Alexandra La Roche||Keto Shimizu & Ubah Mohamed||November 19, 2018|
|A new fugitive is on the loose in 1951 Tokyo and Sara, Zari, Rory and Charlie try to capture it. As Constantine struggles to recover, Ray knows that Magic might be the only thing that can save him but must look outside the team for help. Meanwhile, Ava joins Nate and his family for an unconventional Thanksgiving dinner.|
|6||""||Dean Choe||Phil Klemmer & Matthew Maala||November 26, 2018|
|When Hank Heywood confronts Ava about the spending habits of the Legends, Nate steps in to try and smooth things over by inviting Hank on to the Waverider. The Legends then show Hank what they do by visiting 1920s Paris, trying to capture the newest fugitive. Meanwhile, Mona is trying to make a good impression with Ava, but her over eagerness gets her and Ava stuck in a cell instead.|
|7||""||April Mullen||Grainne Godfree & Morgan Faust||December 3, 2018|
|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.|
|8||""||Ben Bray||James Eagan & Ray Utarnachitt||December 10, 2018|
|After Constantine breaks the cardinal Legend rule, you can't change the past, he, along with Charlie and Zari try to deal with the ramifications without telling the rest of the Legends. Even though Zari encourages them to just fix the problem, Constantine and Charlie are determined to find another way, but only continue to make things worse.|
|9||""||Andrew Kasch||Keto Shimizu & Tyron B. Carter||April 1, 2019|
|When the Legends hear that Mona has let a fugitive go, they must head to 1961 Mexico City to clean up her mess. Mona tries to convince the Legends and the Bureau that the people responsible for releasing the fugitive were some mysterious Men in Black and not her. With no evidence to back up her theory, the Legends must decide if they should trust her and go against the Bureau. Meanwhile, Nate and Zari go on a recon mission to find out what Hank might be hiding from everyone.|
|10||""||Viet Nguyen||Matthew Maala & Ubah Mohamed||April 8, 2019|
|When Hank commandeers the Waverider in 1973, the Legends find themselves on the run in an RV after kidnapping the President who is only able to tell the truth. With the help of Constantine, they discover the reason that none of them can lie making for an uncomfortable family road trip. Meanwhile, Nate and Zari, with the help of Nora and Gary, work together to find out what Hank is really up to.|
|11||""||Alexandra La Roche||Grainne Godfree & Jackie Canino||April 15, 2019|
|When Mona discovers that her favorite author, Jane Austen, might be at the epicenter of a magical alert, Mona, Sara, Charlie and Zari find themselves in 1809. With Nate still dealing with family issues, Constantine and Rory perform a séance and receive a message from the other world that rocks Constantine to his core. Meanwhile, Ray and Nora are forced into close quarters.|
|12||""||Mairzee Almas||Morgan Faust & Daphne Miles||April 22, 2019|
|With darkness on the rise in 2019, the team realizes that a new host of problems have risen as they have been cleaning up history. Sara tries to save Ava from a fate worse than death while battling her own demons. Nora and Constantine work together to take down a powerful demon. Meanwhile, Zari gets unsolicited advice from Mona, Charlie, and even Rory.|
|13||""||Chris Tammaro||James Eagan & Tyron B. Carter||April 29, 2019|
|While Ray is worried about Nora, he is suddenly faced with his own problem that forces him to do the unthinkable. Nate and Zari are stuck in an awkward limbo, so Sara devises a plan to send them on an easy mission together. Meanwhile, Charlie and Rory are approached with a lucrative offer that could upend their lives.|
|14||""||David Geddes||Ray Utarnachitt & Matthew Maala||May 6, 2019|
|With Constantine missing, the Legends struggle to find a way to track him. When Sara hesitates to make a tough call, Rory steps up creating a wedge in the team. Meanwhile, Ava gives Gary the responsibility of handling the Bureau performance reviews for all the agents.|
|15||""||April Mullen||Grainne Godfree & Ubah Mohamed||May 13, 2019|
|With things getting out of control, Sara and Ava concoct a bold plan to take back the Time Bureau. But when things go awry, Zari and Charlie must work together to discover what Neron is planning. Elsewhere, Constantine, is given a tough choice on who to save from Hell.|
|16||""||Kevin Mock||Phil Klemmer & Keto Shimizu||May 20, 2019|
|While on a mission to find Ray, Constantine and Nora discover Neron’s evil plan. Nate convinces the Legends to think outside the box and suggests a dangerous plan to unite magical creatures and people to save the world.|
- Prior to the season premiere, The CW aired a TV special to promote this season as well as the return of the character John Constantine that was titled .
- Despite being credited in the "main cast" bill, Courtney Ford (Nora Darhk/Fairy Godmother) and Ramona Young (Mona Wu/Wolfie) were only credited for their respective episode appearances.
- Maisie Richardson-Sellers (Amaya Jiwe/Vixen) originally left the cast at the end of the last season until "" where she was credited in the "special appearance by" bill. She then rejoined the main cast in the following episode as Charlie.
- Despite being credited in the "special appearance by" bill, Matt Ryan (John Constantine) appeared more frequently than Maisie Richardson-Sellers, Jes Macallan (Ava Sharpe), Courtney Ford, Ramona Young, and Nick Zano (Nate Heywood/Steel), all of whom were series regulars.
- Brandon Routh (Ray Palmer/The Atom), Caity Lotz (Sara Lance/White Canary), Tala Ashe (Zari Tomaz), Amy Pemberton (Gideon), Dominic Purcell (Mick Rory/Heat Wave), and Matt Ryan were the only actors to appear in every episode this season.
- This was the first season of :
- To not feature Stephen Amell (Oliver Queen/Green Arrow), Arthur Darvill (Rip Hunter), Franz Drameh (Jefferson Jackson/Firestorm), Victor Garber (Martin Stein/Firestorm), Isabella Hofmann (Clarissa Stein), Graeme McComb (young Martin Stein), Neal McDonough (Damien Darhk), Wentworth Miller (Leonard Snart/Captain Cold and Leo Snart), Emily Bett Rickards (Felicity Smoak), Johnathon Schaech (Jonah Hex), and Carlos Valdes (Cisco Ramon) in any capacity.
- To not have an introduction at the beginning of any episode.
- Since Season 1 to not to include a crossover episode.
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