Arrow Season 5 | The Flash Season 3 | Legends of Tomorrow Season 2 | Supergirl Season 2
Supergirl 2×01 “The Adventures of Supergirl” AP2HYC Review Note: Supergirl switched from CBS to The CW. You still don’t need to watch the other shows to enjoy Supergirl, nor do you need to watch Supergirl for things in the other shows, being as they still are set on different Earths.
Supergirl 2×02 “The Last Children of Krypton” AP2HYC Review
Supergirl 2×03 “Welcome to Earth” AP2HYC Review
Supergirl 2×04 “Survivors” AP2HYC Review
Supergirl 2×05 “Crossfire” AP2HYC Review
Supergirl 2×06 “Changing” AP2HYC Review
Supergirl 2×07 “The Darkest Place” AP2HYC Review
Supergirl 2×08 “Medusa” AP2HYC Review Crossover with The Flash. At the end of the episode, Barry Allen and Cisco Ramone arrive at Kara’s apartment to ask for aid in dealing with an alien threat on Earth-1. Note: Since Barry and Cisco only show up at the end of the episode, it’s not necessary to watch the other “Invasion!” episodes The Flash 3×08, Arrow 5×08, and Legends of Tomorrow 2×07. Also, the events of this episode are repeated in The Flash, so is not integral to watch this to understand the crossover
The Flash 3×01 “Flashpoint” AP2HYC Review
The Flash 3×02 “Paradox” AP2HYC Review
The Flash 3×03 “Magenta” AP2HYC Review
The Flash 3×04 “The New Rogues” AP2HYC Review
The Flash 3×05 “Monster” AP2HYC Review
The Flash 3×06 “Shade” AP2HYC Review
The Flash 3×07 “Killer Frost” AP2HYC Review
Arrow 5×01 “Legacy” AP2HYC Review
Arrow 5×02 “The Recruits” AP2HYC Review
Legends of Tomorrow 2×01 “Out of Time” AP2HYC Review Crossover with Arrow Oliver Queen assists historian Nate Heywood in locating the lost Legends and the Waverider. Note: You do not need to watch Arrow to understand events in this episode or vice versa.
Legends of Tomorrow 2×02 “The Justice Society of America” AP2HYC Review Eobard Thawne seemingly is involved with some dark plot and to be traveling through time. He was last seen in The Flash 3×01 “Flashpoint.”
Legends of Tomorrow 2×03 “Shogun” AP2HYC Review At the end of the episode, Martin Stein and Jackson discover a secret room on the Waverider where they listen to a message from Barry Allen, the Flash, of 2056. Note: We do not know what the message detailed yet, but it does become important later on in The Flash.
Arrow 5×03 “A Matter of Trust” AP2HYC Review
Arrow 5×04 “Penance” AP2HYC Review
Arrow 5×05 “Human Target” AP2HYC Review
Arrow 5×06 “So It Begins” AP2HYC Review
Arrow 5×07 “Vigilante”
Legends of Tomorrow 2×04 “Abominations”
Legends of Tomorrow 2×05 “Compromised” AP2HYC Review Eobard Thawne and Damien Darkh appear together. For more information about Damien Darkh see Arrow, but the only thing you need to know is that **MAJOR ARROW SPOILER** Darkh killed Sara’s older sister, Laurel and Sara really wants him dead. The team learn that they are in fact dealing with a time-traveling speedster.
Legends of Tomorrow 2×06 “Outlaw Country” AP2HYC Review At the end of the episode, Sara and the team are headed to 2016 to aid their friends.
The Flash 3×08 “Invasion!” AP2HYC Review Crossover with Arrow, Supergirl, and Legends of Tomorrow
Arrow 5×08 “Invasion!” AP2HYC Review Crossover with The Flash, Supergirl, and Legends of Tomorrow Note: The Flash, Supergirl, and Legends of Tomorrow viewers don’t necessarily need to have watched Arrow extensively prior to this crossover but may find this episode of the crossover a little confusing, particularly concerning all the references to Arrow’s past events. A bit of past knowledge will help make the narrative more engaging, but overall the episode shouldn’t be too off-putting and merely give you insight into these characters. Legends of Tomorrow viewers will probably find this episode the most enjoyable, outside of Arrow viewers, because it heavily features Sara and Ray.
Legends of Tomorrow 2×07 “Invasion!” AP2HYC Review Crossover with Arrow, The Flash, and Supergirl This episode in the conclusion to the epic crossover event. Note: Non-Legends viewers do not need to watch previous Legends episodes to understand what is going on or enjoy it. A bit of past knowledge of the characters like Amaya, Nate and Mick would be helpful, but not necessary. The characters of Flash and Arrow appear equally in this episode.
The Flash 3×09 “The Present”
The Flash 3×10 “Borrowing Problem from the Future” AP2HYC Review
The Flash 3×11 “Dead or Alive” AP2HYC Review
The Flash 3×12 “Untouchable” AP2HYC Review
The Flash 3×13 “Attack on Gorilla City” AP2HYC Review
The Flash 3×14 “Attack on Central City” AP2HYC Review
The Flash 3×15 “The Wrath of Savitar” AP2HYC Review
The Flash 3×16 “Into the Speed Force” AP2HYC Review Note: In this episode, Barry releases Hunter Zolomon, the zombie speedster from the Speed Force with Cisco’s device. This event becomes important later in Legends of Tomorrow Season 2.
Supergirl 2×09 “Supergirl Lives”
Supergirl 2×10 “We Can Be Heroes”
Supergirl 2×11 “The Martian Chronicles”
Supergirl 2×12 “Luthors”
Supergirl 2×13 “Mr. & Mrs. Mxyzptik”
Supergirl 2×14 “Homecoming”
Supergirl 2×15 “Exodus”
Supergirl 2×16 “Star-crossed” The Music Meister is brought in at the end of the episode, putting Kara under his spell. Music Meister escapes to Earth-1. Note: This is a start of a musical crossover with The Flash 3×17.
The Flash 3×17 “Duet” AP2HYC Review Crossover with Supergirl Note: The events in this episode started in Supergirl 2×16. You only need to watch that episode to understand what’s going on. Martin Stein (from Legends) and Malcolm Merlyn (from Arrow and Legends) appear as characters in the musical in Kara and Barry’s minds. As it is a fantasy sequence, their appearances have no bearing on the main plot of any show.
The Flash 3×18 “Abra Kadabra” AP2HYC Review
The Flash 3×19 “The Once and Future Flash” AP2HYC Review
The Flash 3×20 “I Know Who You Are” AP2HYC Review
The Flash 3×21 “Cause and Effect” AP2HYC Review
The Flash 3×22 “Infantino Street” AP2HYC Review
The Flash 3×23 “Finish Line” AP2HYC Review
Arrow 5×09 “What We Leave Behind” AP2HYC Review
Arrow 5×10 “Who Are You?” AP2HYC Review
Arrow 5×11 “Seconds Chances” AP2HYC Review
Arrow 5×12 “Bratva” AP2HYC Review
Arrow 5×13 “Spectre of the Gun” AP2HYC Review
Arrow 5×14 “The Sin-Eater” AP2HYC Review
Arrow 5×15 “Fighting Fire with Fire” AP2HYC Review
Arrow 5×16 “Checkmate”
Arrow 5×17 “Kapiushon” AP2HYC Review
Arrow 5×18 “Disbanded”
Arrow 5×19 “Dangerous Liaisons” AP2HYC Review
Arrow 5×20 “Underneath” AP2HYC Review
Arrow 5×21 “Honor Thy Fathers” AP2HYC Review
Arrow 5×22 “Missing”
Arrow 5×23 “Lian Yu” AP2HYC Review
Legends of Tomorrow 2×08 “The Chicago Way” AP2HYC Review
Legends of Tomorrow 2×09 “Raiders of the Lost Art” AP2HYC Review
Legends of Tomorrow 2×10 “The Legion of Doom” AP2HYC Review Note: Viewers may want to watch The Flash 2×18, 2×22 and 2×22 to understand who Hunter Zolomon is, but it is not completely necessary to do so.
Legends of Tomorrow 2×11 “Turncoat”
Legends of Tomorrow 2×12 “Camelot/3000”
Legends of Tomorrow 2×13 “Land of the Lost”
Legends of Tomorrow 2×14 “Moonshot”
Legends of Tomorrow 2×15 “Fellowship of the Spear”
Legends of Tomorrow 2×16 “Doomworld” There are cameos by characters from other shows, particularly Arrow. However, this is set in an alternate reality so has no bearing on any other show’s plot
Legends of Tomorrow 2×17 “Aruba”
Supergirl 2×17 “Distant Sun”
Supergirl 2×18 “Ace Reporter”
Supergirl 2×19 “Alex”
Supergirl 2×20 “City of Lost Children”
Supergirl 2×21 “Resist”
Supergirl 2×22 “Nevertheless, She Persisted”