Season 6 (The Flash: 2014)

"We've all lost so much this year. Our power, our love, our family. At times, it's even felt like there's nothing left to lose, like everything that matters has already been taken, and our lives are empty, hollow inside. Some things can't be taken. Look around this room. We still have our faith in each other and our will to fight for those we love. This is what we'll never lose. Eva McCulloch has never faced us head-on. And that's about to change. We're gonna find her, beat her, and get back everyone."

- Barry Allen's motivational speech

The sixth season of premiered on October 8, 2019, on The CW and concluded on May 12, 2020. The season consisted of 19 total episodes during its run.

Synopsis
Reeling from the loss of Nora, Barry throws himself into work, defeating a record number of metas over the summer, while the rest of Team Flash deals with changes of their own – Cisco, having taken the meta-human cure, is no longer Vibe, Joe is now Captain of C.C.P.D., D.A. Cecile Horton is now considering leaving the district attorney's office, and Ralph Dibny is now searching for a missing heiress named Sue Dearbon. But all of that is put on hold when Dr. Ramsey Rosso, intent on curing death, is overtaken by his own desperation and ambition giving birth to a new villain, Bloodwork.

Cast

 * -|Pre-Crisis Cast=

Main Cast

 * Grant Gustin as The Flash/Dark Flash (Barry Allen)
 * Candice Patton as Iris West-Allen
 * Danielle Panabaker as Frost (Caitlin Snow)
 * Carlos Valdes as Vibe (Cisco Ramon) / Echo (Cisco Ramon)
 * Hartley Sawyer as Elongated Man (Ralph Dibny)
 * Danielle Nicolet as Cecile Horton
 * LaMonica Garrett as The Monitor (Mar Novu) / Anti-Monitor (Mobius) *
 * Tom Cavanagh as Pariah (Nash Wells) / Reverse-Flash (Eobard Thawne)
 * Jesse L. Martin as Joe West

Recurring Cast

 * Sendhil Ramamurthy as Bloodwork (Ramsey Rosso)
 * Victoria Park as Kamilla Hwang
 * Brandon McKnight as Chester P. Runk
 * Ryan Handley as Godspeed
 * John Wesley Shipp as Jay Garrick / The Flash (Barry Allen)
 * Michelle Harrison as Joan Williams / Nora Allen (Speed Force)
 * Kayla Compton as Accelerant (Allegra Garcia)
 * Alexa Barajas as Ultraviolet (Esperanza Garcia)
 * Shawn Sewart as Mitch Romero
 * Mark Sweatman as Michael Norvock
 * Meera Simhan as Rachel Rosso
 * Tess Atkins as Natalie
 * Rebecca Roberts as January Galore (Sue Dearbon)

In-Universe Guest Stars

 * Jon Cryer as Lex Luthor
 * Matt Ryan as John Constantine
 * Tom Ellis as Lucifer Morningstar
 * Stephen Amell as Green Arrow (Oliver Queen)
 * Caity Lotz as White Canary (Sara Lance)
 * Brandon Routh as Atom (Ray Palmer) / Superman (Clark Kent)
 * David Ramsey as John Diggle
 * Katherine McNamara as Mia Smoak
 * Elizabeth Tulloch as Lois Lane
 * David Harewood as J'onn J'onzz
 * Tyler Hoechlin as Superman (Clark Kent)
 * Cress Williams as Black Lightning (Jefferson Pierce)
 * Ruby Rose as Batwoman (Kate Kane)
 * Melissa Benoist as Supergirl (Kara Danvers)
 * Ashley Scott as Huntress (Helena Kyle)
 * Audrey Marie Anderson as Harbinger (Lyla Michaels) / Anti-Monitor (Mobius)
 * Osric Chau as Ryan Choi
 * Stephen Lobo as Jim Corrigan
 * Wentworth Miller as Leonard


 * -|Post-Crisis Cast=

Main Cast

 * Grant Gustin as The Flash (Barry Allen)
 * Candice Patton as Iris West-Allen / Iris West-Allen
 * Danielle Panabaker as Frost (Caitlin Snow)
 * Carlos Valdes as Cisco Ramon
 * Hartley Sawyer as Elongated Man (Ralph Dibny)
 * Danielle Nicolet as Cecile Horton
 * Efrat Dor as Eva McCulloch *
 * Tom Cavanagh as Nash Wells / Harry Wells / Harrison Sherloque Wells / Reverse-Flash (Eobard Thawne)
 * Jesse L. Martin as Joe West / Joe West (Ralph Dibny)

Recurring Cast

 * Sendhil Ramamurthy as Bloodwork (Ramsey Rosso)
 * Victoria Park as Kamilla Hwang / Kamilla Hwang
 * Brandon McKnight as Chester P. Runk
 * Ryan Handley as Godspeed Clones
 * Michelle Harrison as Nora Allen (Speed Force)
 * Kayla Compton as Allegra Garcia
 * Alexa Barajas as Ultraviolet (Esperanza Garcia)
 * Tess Atkins as Natalie
 * Eric Nenninger as Joseph Carver
 * Emmie Nagata as Doctor Light (Kimiyo Hoshi)
 * Andrew J. Hampton as Maurice Bumblefeather
 * Stephanie Iszak as Daisy Korber
 * Natalie Dreyfuss as Sue Dearbon
 * Andy Mientus as Pied Piper (Hartley Rathaway)
 * Patrick Sabongui as David Singh / David Singh
 * Natalie Sharp as Sunshine (Millie Rawlins)

In-Universe Guest Stars

 * David Ramsey as John Diggle

Notes:
 * 1) LaMonica Garrett is only credited for his respective episode appearances.
 * 2) Efrat Dot is credited as a series regular from 5x12  onwards.

Soundtrack
On February 26, 2021, an album consisting of incidental music from the season was released digitally on Spotify and Apple Music.