"Success Is Assured" is the nineteenth and final episode of the sixth season of , and the one-hundred-thirty-third episode overall. It aired on May 12, 2020.
|Barry considers a risky plan to save Iris from the Mirrorverse. Ralph attempts to stop Sue from making a grave mistake that could destroy her life.|
As Eva McCulloch dons a new suit to accommodate for years in another dimension, "David" is on the phone with his superior at CCPD, thanking his boss for understanding he needed leave time to be with his ill mother while she recovers; "everything i am came from her, after all". The two decided that all that Joseph Carver has must be destroyed before he dies.
Team Flash has a meeting at the police precinct, since Barry Allen doesn't want to add his job to everything else he has recently lost. During the meeting, Ralph Dibny reveals the Black Hole diamond he got from Sue Dearbon; Allegra Garcia notes that it emits radiation. Focusing the emissions, she helps the team to find a warehouse that Black Hole uses for storage. When the Flash and Elongated Man arrive, they see "David" has killed the security guards and is about to set the place ablaze. "David" succeeds.
The game plan now changes to the protection of Carver from his deranged wife. Caitlin Snow cannot participate though, as Carla Tannhauser has arrived to take her daughter away to heal. The two decided to heal their relationship as Frost wants to be closer to her as well.
In the Mirrorverse, at its version of S.T.A.R. Labs, Iris West-Allen and Kamilla Hwang discuss how to find David Singh; though Kamilla has not adapted, Iris begins to itch and, every-so-often, begins to see what appears on reflective surfaces. With his meta-humans gone, Carver goes to Team Flash for protection. At the precinct while they wait for an A.R.G.U.S. transport, the team and Carver encounter "David"; he proposes to exchange Iris for Carver. As Barry listens, Nash Wells pushes "David" away and teleports the team back to S.T.A.R. Labs. He argues with Barry that he is beginning to act less than heroic, citing that Barry was willing to kill him in order to be rid of Eobard Thawne.
Meanwhile, Sue has reunited with her parents, but has become a Black Hole operative to keep them safe. When Team Flash takes Carver to McCulloch Technologies to protect him there, Sue is present, plotting to double-cross and kill him herself.
Suddenly, Eva McCulloch's team arrives. Team Flash assume they are mirror clones, but the trio reveal that Eva convinced them to help murder Carver to liberate themselves from the blackmail he's been using to keep them under his control. Carver sends his security guards to assault the women causing a melee that eventually brings Team Flash into the fight. The Flash is protecting Carver from Eva; Eva succeeds in killing Carver. With Carver dead, the fight is over.
Sue is jubilant that Carver is dead; Ralph informs her that Eva had a press conference, blaming her for Carver's death.
In the Mirrorverse, Iris has a moment of clarity and locates David. Suddenly, as Kamilla panics, Iris glows and disappears.
- Grant Gustin as Barry Allen/The Flash
- Candice Patton as Iris West-Allen
- Danielle Panabaker as Dr. Caitlin Snow/Frost
- Carlos Valdes (credit only)
- Hartley Sawyer as Ralph Dibny/Elongated Man
- Danielle Nicolet as Defense Attorney Cecile Horton
- Efrat Dor as Eva McCulloch and Dr. Eva McCulloch
- Tom Cavanagh as Dr. Harrison Nash Wells and Dr. Harrison "Harry" Wells
- Jesse L. Martin as Captain Joe West
- Patrick Sabongui as David Singh
- Susan Walters as Dr. Carla Tannhauser
- Victoria Park as Kamilla Hwang
- Kayla Compton as Allegra Garcia
- Natalie Dreyfuss as Sue Dearbon
- Eric Nenninger as Joseph Carver
- Emmie Nagata as Kimiyo Hoshi/Dr. Light
- Natalie Sharp as Millie Rawlins/Sunshine
- Alexa Barajas as Ultraviolet
- Mark Brandon as Richard Dearbon
- Nancy Hillis as Penelope Dearbon
- Andrew J. Hampton as Maurice
- Darcy Hinds as McCulloch Guard
- Kat Elizabeth as Reporter 1
- Conor Wylie as Reporter 2
- The title references the mantra frequently repeated by the mirror duplicates to Eva McCulloch which in-turn was inspired by the phrase from the Wright brothers.
- Due to the COVID-19 pandemic, Grant Gustin revealed in an interview with TVLine that this episode serves as the sixth season finale.
- Also, the episode has a different cliffhanger than planned, as the original season finale was going to have an Eobard Thawne-based cliffhanger for the next season.
- Since the season was cut short, this marks the first season finale where Carlos Valdes (Cisco Ramon) is absent.
- At the end of the episode, the "To Be Continued.." was shown to prepare for the next season.
- This is the first season finale where the main season antagonist was not defeated by Team Flash. However, this is due to this episode not originally being written as a season finale.
- This is the second season finale where a major protagonist doesn't get killed. The first was the Season 4 finale "".
- This episode marks the final appearance of Hartley Sawyer (Ralph Dibny) on the show due to being fired on June 8, 2020 as a result of offensive tweets resurfacing.
- This is the last episode to credit Kayla Compton as a guest star, as she is upgraded to series regular in season 7.
- Nash shouldn't make an appearance at CCPD because the police who are working there could have recognized him as Harrison Wells because of what happened in Season 1 in which Eobard Thawne was supposed to turn himself in because of his crimes such as the creation of the Particle accelerator and the murder of Nora Allen.
- In the mirrored McCulloch Technologies, the secret room behind the mirror is accessible by a button on the right hand side. However, in the real world, the button is still on the right when it should be on the left.
|Blood and Truth|
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|Reflections and Lies|
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