TV Episode | TV-14 | | Action, Adventure, Drama
The gang comes together for Barry and Iris's wedding, but the ceremony is crashed by villains from Earth-X.
As of this episode, Candice Patton (Iris West), Chyler Leigh (Alex Danvers) and Tom Cavanagh (Harry Wells aka Eobard Thawne / Reverse Flash) have now joined Stephen Amell (Oliver Queen / Green Arrow / Dark Arrow), Grant Gustin (Barry Allen / The Flash), Melissa Benoist (Kara Danvers / Supergirl / Overgirl), Carlos Valdes (Cisco Ramon / Vibe), Danielle Panabaker (Caitlin Snow / Killer Frost), Caity Lotz (Sara Lance / White Canary), Victor Garber (Martin Stein / Firestorm), Franz Drameh (Jefferson "Jax" Jackson / Firestorm), Emily Bett Rickards (Felicity Smoak / Overwatch) and Dominic Purcell (Mick Rory / Heat Wave) in appearing across all 4 of the Arrowverse shows: Arrow (2012), The Flash (2014), Legends of Tomorrow (2016) & Supergirl (2015).
General, would you care to step outside?
Several CGI shots in the final battle appear to be unfinished or poorly rendered, most notably Supergirl's face when she appears in the "hero line".
The usual opening narration and title card are replaced by a special "Crisis on Earth-X" sequence.