Season 1 (The Flash)

The first season of The Flash premiered on October 7, 2014 on The CW and concluded on May 19, 2015. The season consisted of 23 episodes.

Synopsis
Barry Allen was just 11 years old when his mother was killed in a bizarre and terrifying incident and his father was falsely convicted of the murder. With his life changed forever by the tragedy, Barry was taken in and raised by Detective Joe West, the father of Barry’s best friend, Iris. Now, Barry has become a brilliant, driven and endearingly geeky CSI investigator, whose determination to uncover the truth about his mother’s strange death leads him to follow up on every unexplained urban legend and scientific advancement that comes along. Barry’s latest obsession is a cutting edge particle accelerator, created by visionary physicist Harrison Wells and his S.T.A.R. Labs team, who claim that this invention will bring about unimaginable advancements in power and medicine. However, something goes horribly wrong during the public unveiling, and when the devastating explosion causes a freak storm, many lives are lost and Barry is struck by lightning. After nine months in a coma, Barry awakens to find his life has changed once again - the accident has given him the power of super speed, granting him the ability to move through Central City like an unseen guardian angel. Though initially excited by his newfound powers, Barry is shocked to discover he is not the only "meta-human" who was created in the wake of the accelerator explosion - and not everyone is using their new powers for good. In the months since the accident, the city has seen a sharp increase in missing people, unexplained deaths and other strange phenomena. Barry now has a renewed purpose - using his gift of speed to protect the innocent, while never giving up on his quest to solve his mother’s murder and clear his father’s name. For now, only a few close friends and associates know that Barry is literally the fastest man alive, but it won’t be long before the world learns what Barry Allen has become, The Flash.

Main cast

 * Grant Gustin as Barry Allen/The Flash
 * Candice Patton as Iris West
 * Danielle Panabaker as Dr. Caitlin Snow
 * Rick Cosnett as Detective Eddie Thawne
 * Carlos Valdes as Cisco Ramon
 * Tom Cavanagh as Eobard Thawne/Reverse-Flash/Dr. Harrison Wells
 * Jesse L. Martin as Detective Joe West

Recurring cast

 * Patrick Sabongui as Captain David Singh
 * John Wesley Shipp as Dr. Henry Allen
 * Robbie Amell as Ronnie Raymond/Firestorm (special guest star)
 * Wentworth Miller as Leonard Snart/Captain Cold (special guest star)
 * Roger Howarth as Mason Bridge
 * Malese Jow as Linda Park
 * Michelle Harrison as Nora Allen
 * Clancy Brown as General Wade Eiling/Goldfinger (special guest star)
 * Emily Bett Rickards as Felicity Smoak (special guest star)
 * Stephen Amell as Oliver Queen/The Arrow/Al Sah-him (special gust star)
 * Simon Burnett (body) and David Sobolov (voice) as Grodd
 * Liam McIntyre as Mark Mardon/Weather Wizard
 * Victor Garber as Professor Martin Stein/Firestorm (special guest star)
 * Dominic Purcell as Mick Rory/Heat Wave (special guest star)
 * Amanda Pays as Dr. Tina McGee
 * Andy Mientus as Hartley Rathaway/Pied Piper
 * Chad Rook as Clyde Mardon
 * Anthony Carrigan as Kyle Nimbus/The Mist
 * Paul Anthony as Roy G. Bivolo/Rainbow Raider
 * Britne Oldford as Shawna Baez/Peek-a-Boo
 * Peyton List as Lisa Snart/Gold Glinder
 * Matt Letscher as Eobard Thawne/Reverse-Flash (prime)
 * Al Sapienza as Detective Fred Chyre
 * David Ramsey as John Diggle (special guest star)
 * Brandon Routh as Ray Palmer/The Atom (special guest star)
 * Paul Blackthorne as Capitain Quentin Lance (special guest star)
 * Katie Cassidy as Laurel Lance/Black Canary (special guest star)
 * Ciara Renée as Kendra Saunders (special apperance)

DVD release
A boxset of the first season, titled The Flash: The Complete First Season, will be released on DVD and Blu-ray on September 22, 2015. It will contain additional features, deleted scenes, a gag reel, audio commentaries and the "A Night of DC Entertainment" panel from the San Diego Comic-Con International 2014.