when do the arrow and the flash crossover
Flash vs. Arrow "Flash vs. Arrow" is the first annual Arrowverse crossover event, broadcast on The CW, featuring episodes of the Arrowverse television series The Flash and Arrow. The event began on December 2, 2014, with The Flash episode "Flash vs. Arrow" and concluded the next day with the Arrow episode "The Brave and The Bold". The crossover sees Team Flash (Barry Allen / Flash, Caitlin Snow, and Cisco Ramon) helping Team Arrow (Oliver Queen / Arrow, Felicity Smoak, and John Diggle) take on the boomerang-wielding villain Captain Boomerang, while Team Arrow helps Team Flash confront the metahuman Roy Bivolo.
Crisis on Earth-X "Crisis on Earth-X" is the fourth annual Arrowverse crossover event, featuring episodes of the live-action television series Supergirl, Arrow, The Flash, and Legends of Tomorrow on The CW. The crossover began on November 27, 2017, with Supergirl and Arrow, and concluded on November 28, with The Flash and Legends of Tomorrow. In "Crisis on Earth-X", Barry Allen and Iris West's friends come to Central City for their wedding, only to be interrupted when villains from Earth-X disrupt the proceedings.
The Flash (2014 TV series) After witnessing his mother's supernatural murder, Barry Allen is taken in by Detective Joe West and his family. Barry becomes a brilliant but socially awkward crime scene investigator for the Central City Police Department. A particle accelerator malfunctions, bathing the city center with a radiation during a thunderstorm, and Barry is struck by lightning. Awakening after a coma, he discovers he can move at superhuman speeds. Harrison Wells, the accelerator's designer, describes Barry's nature as "metahuman". Barry vows to use his gifts to protect Central City. As the Flash, Barry also pursues his mother's murderer, the Reverse-Flash.[4]
List of St. Elsewhere characters Portrayed by Denzel Washington