Superman And Supergirl Episodes-did You Skip These?
Superman and Supergirl crossover episodes list
The core crossover episodes to watch are Supergirl 1x18 "World's Finest" for the first Flash team-up, Supergirl 2x08 "Medusa", the three-part Invasion! event across The Flash 3x08, Arrow 5x08, and Legends of Tomorrow 2x07, plus the eight-episode Crisis on Infinite Earths crossover that includes Supergirl 5x09 and a Superman appearance across the Arrowverse event.
Episode list
The most useful way to understand the watch order is to separate direct Superman-Supergirl team-ups from broader Arrowverse crossovers that feature both characters or their shared universe.
- Supergirl 1x18 - "World's Finest" (2016): Barry Allen crosses over to Kara's world and teams up with her against Silver Banshee and Livewire.
- Supergirl 2x08 - "Medusa" (2016): Kara's story connects to Barry and Cisco's visit, bridging into the larger alien-invasion storyline.
- The Flash 3x08 - "Invasion!" (2016): The Dominator invasion begins and Supergirl joins the wider hero coalition.
- Arrow 5x08 - "Invasion!" (2016): The crossover continues with Supergirl interacting with Team Arrow and Team Flash.
- Legends of Tomorrow 2x07 - "Invasion!" (2016): The final chapter of the alien invasion event features Supergirl alongside multiple Arrowverse teams.
- Supergirl 3x08 - "Crisis on Earth-X, Part 1" (2017): Barry and Iris's wedding is interrupted by Earth-X villains, and Superman-adjacent Arrowverse stakes rise sharply.
- Supergirl 5x09 - "Crisis on Infinite Earths: Part One" (2019): The Monitor gathers heroes including Supergirl and Superman for the multiverse-threatening Crisis.
Structured watch order
If you want the cleanest watch order, start with the earliest direct crossover and move through the Arrowverse events in broadcast sequence, because the character relationships and continuity build on one another.
- Supergirl 1x18 - "World's Finest."
- Supergirl 2x08 - "Medusa."
- The Flash 3x08 - "Invasion!"
- Arrow 5x08 - "Invasion!"
- Legends of Tomorrow 2x07 - "Invasion!"
- Supergirl 3x08 - "Crisis on Earth-X, Part 1."
- Supergirl 5x09 - "Crisis on Infinite Earths: Part One."
Episode table
The table below gives a quick reference guide to the key episodes most viewers mean when they ask for Superman and Supergirl crossover episodes.
| Episode | Series | Year | Why it matters |
|---|---|---|---|
| World's Finest | Supergirl 1x18 | 2016 | First major Kara-and-Barry crossover; often treated as the gateway episode. |
| Medusa | Supergirl 2x08 | 2016 | Connects Supergirl to the broader multiverse setup and future team events. |
| Invasion! | The Flash 3x08 | 2016 | Starts the major alien-invasion crossover event. |
| Invasion! | Arrow 5x08 | 2016 | Middle chapter of the same event, with Supergirl involved. |
| Invasion! | Legends of Tomorrow 2x07 | 2016 | Event finale; brings all teams together. |
| Crisis on Earth-X, Part 1 | Supergirl 3x08 | 2017 | Launches the Earth-X four-part crossover. |
| Crisis on Infinite Earths: Part One | Supergirl 5x09 | 2019 | Begins the largest Arrowverse crossover and includes Superman in the wider hero roster. |
Why fans rank them differently
Fan rankings usually separate the emotionally strongest episodes from the most important continuity episodes, which is why World's Finest often tops popularity lists while Crisis on Infinite Earths dominates "largest event" discussions.
IMDb-style ranking pages show that Arrowverse crossover episodes consistently draw strong attention, with entries like "World's Finest," "Invasion!," and "Crisis on Earth-X" appearing among the most discussed team-up episodes.
"The first real chemistry test between Kara and Barry is what made the crossover era feel essential, not optional," is a fair shorthand for why "World's Finest" still gets singled out by fans and watch-order guides.
Superman-specific notes
Strictly speaking, most widely cited Superman crossover episodes are not all inside Supergirl itself; some are broader Arrowverse events where Superman is part of the shared continuity, while others are comic-story crossovers published by DC rather than TV episodes.
DC's 2019 comic solicitations also showed that Superman and Supergirl crossover stories remained active in print, with Supergirl #31 and Superman #12 marketed as the start of an intergalactic war storyline.
Best viewing path
The most practical viewing path is to start with "World's Finest," then watch the Arrowverse events in release order, because each crossover assumes you remember at least some of the prior team-up dynamics.
For viewers who only want the episodes that matter most to Superman and Supergirl's shared world, the shortest useful list is "World's Finest," "Invasion!" across its three parts, and "Crisis on Infinite Earths: Part One".
Frequently asked questions
Context and significance
The Arrowverse era made crossover television unusually coherent by turning guest appearances into annual event programming, and that is why these episodes are still the standard answer when people search for "Superman Supergirl crossover episodes list".
By the time of Crisis on Infinite Earths, the franchise had evolved from one-off teamwork into a large-scale multiverse storyline that treated Kara and Superman as part of a shared heroic network rather than isolated leads.
Helpful tips and tricks for Superman And Supergirl Episodes Did You Skip These
Which episode is the first Superman and Supergirl crossover?
The first widely recognized crossover episode is Supergirl 1x18, "World's Finest," which pairs Kara with Barry Allen and established the template for future Arrowverse team-ups.
How many Supergirl crossover episodes are there?
If you count the major Arrowverse events that involve Supergirl, the core list includes at least seven key episodes, with "World's Finest," "Medusa," the three "Invasion!" chapters, "Crisis on Earth-X, Part 1," and "Crisis on Infinite Earths: Part One" as the essential entries.
What is the best order to watch the crossovers?
The best order is broadcast order: World's Finest, Medusa, the three Invasion! episodes, Crisis on Earth-X, Part 1, and then Crisis on Infinite Earths: Part One.
Are there Superman and Supergirl crossover comics too?
Yes, DC has published Superman-Supergirl crossover comic arcs as well, including a 2019 storyline launched in Supergirl #31 and Superman #12.