The Disney+ Loki series references several alien species throughout its first season. After stealing the Tesseract in Avengers: Endgame, Loki (Tom Hiddleston) is captured by the Time Variance Authority for creating an alternate timeline. To avoid being "reset," he agrees to help the TVA track down a different Loki. Traveling throughout space and time, Loki encounters stranger and stranger things that make him rethink everything he thought he knew about reality.

In the season finale, Loki's variant self, Sylvie (Sophia Di Martino), dismantles the TVA and frees the timeline, thus allowing for infinite alternate realities to form. The multiversal Marvel's What If...? series is a direct result of this act, but it's only the beginning. The MCU will be profoundly affected going forward, possibly creating alternate versions of characters, events, or even entire species.

Related: Loki, Scarlet Witch & Doctor Strange All Break The Multiverse At Once - Theory Explained

The MCU has explored alien worlds before, most notably in the Thor and Guardians of the Galaxy movies, but the TVA's ability to instantly travel to any point in space and time makes Loki the most intergalactic MCU product yet. Unsurprisingly, the series mentions multiple alien species in conversation. Many of them have appeared before, but some have never been seen. Here is every alien species mentioned in Loki, and where else they appear in the MCU.

Asgardian

thor 4 love and thunder unexpected story

It would have been strange for a show about an Asgardian to not mention Asgard. Loki, on his journey to becoming the original MCU Loki, learns about the fate of Asgard while perusing the TVA's files, which details events that happened in Thor: The Dark World, Thor: Ragnarok, and Avengers: Infinity War. Asgardians possess superhuman strength and stamina and also live significantly longer than humans.

Asgardians show up frequently in the MCU. Along with the three Thor movies, the titular God of Thunder appears in every Avengers film. Loki makes an appearance in almost every Avengers movie except for Avengers: Age of Ultron, during which he was impersonating Odin (Anthony Hopkins). Asgardians also turn up in Agents of S.H.I.E.L.D, which is debatably considered canon in the MCU. Lady Sif (Jaimie Alexander) arrives on Earth twice in the show, first to recapture the Asgardian Lorelei, and later in pursuit of a Kree. Another Asgardian, using the alias Elliot Randolph, was revealed in the show to be hiding on Earth as a professor of Norse mythology. After Asgard's destruction in Thor: Ragnarok, the remnants of its population formed a settlement on Earth. Thor left Valkyrie (Tessa Thompson) in charge of the people there, and both characters are scheduled to return in the upcoming Thor: Love and Thunder.

Frost Giant

Frost Giant Laufey from Thor in the MCU

Loki's true parentage comes from Jotunheim, which is inhabited by Frost Giants. Although Loki freely admits this in conversation, having come to terms with the information since its reveal in the first Thor film, the series regrettably never explores this lineage further. Frost Giants have only ever appeared in Thor with the exception of Loki himself, who spends most of his time disguising his Frost Giant form. Frost Giants have red eyes and blue-gray skin and seem to age similarly to Asgardians.

Related: Why Loki Makes Odin’s Frost Giant Lie Even Sadder

Skrull

The Skrulls in disguise in the MCU.

When Loki first enters the TVA headquarters, a Skrull is seen being arrested in the background. These reptilian humanoids have the ability to shapeshift into other lifeforms and also retain recent memories of those they're impersonating. This skill allows them to easily infiltrate planets without raising suspicion.

Captain Marvel introduced Skrulls into the MCU as Carol Danvers finds herself on the wrong side of the endless Kree-Skrull war. Since then, they have reappeared twice. The end of Spider-Man: Far From Home reveals that Nick Fury and Maria Hill are being impersonated by Skrulls for an unspecified amount of time. This choice seems consensual on Nick's part, but the movie does not explain why he would choose this, or for how long. Again at the end of WandaVision, a Skrull reveals herself to Monica Rambeau to deliver a message, presumably from Carol. The upcoming Secret Invasion miniseries will hopefully answer some questions about what the Skrulls have been up to.

Kree

Loki Ronan The Accuser Easter Egg

Kree is one of the species that Mobius mentions having dealt with in the past and have been featured heavily in the MCU. Being half-Kree, the militaristic race has appeared in any Marvel property Carol Danvers has been in, including Captain Marvel, Avengers: Endgame, Shang Chi and the Legend of the Ten Rings, and Marvel's What If...? series. Captain Marvel partly takes place on the Kree's home planet, Hala, which contains very futuristic-looking technology. Hala is also briefly shown in Guardians of the Galaxy Vol. 2 as one of the places Ego tries to destroy. They are portrayed as very scientifically advanced and the majority of the Kree have blue skin, though some have human skin tones.

The moon Lamentis-1, which Loki and Sylvie visit, is officially on the edge of Kree space as well. Loki reveals very little about this moon and its inhabitants, but they seem to be humanoid and possess a rigid class system and sleek technology. Its entire population is wiped out after Lamentis broke apart and crashed into its moon. The Kree also make appearances in the first Guardians of the Galaxy, as Ronan the Accuser and Korath the Pursuer ignore a peace treaty their people made, and in Agents of S.H.I.E.L.D. The TV series addresses the Kree's experiments to create Inhumans, whose genetic makeup allows them to develop special powers when exposed to a Terrigen mist. The upcoming Marvel and Disney+ series Ms. Marvel will officially introduce Inhumans to the MCU, and may also bring back the Kree.

Related: Captain Marvel: The Kree-Skrull War Explained

Titan

A shot of Thanos before he battles Nebula in Avengers: Infinity War

Mobius also mentions dealing with Titans. Thanos is the only Titan ever shown in the MCU and the last of his people. He explained to Doctor Strange that he first suggested his idea of randomly killing half the population as a solution to Titan's overpopulation problem. They ignored his suggestion and the planet eventually grew uninhabitable. His death at the hands of the Avengers results in the race's extinction. Thanos appears in all four Avengers films, though just in an after-credits scene for the first two, as well as in the second What If? episode. Thanos is much larger than humans and has immense strength similar to the Hulk. Titans also possess long lifespans since Thanos had lived for thousands of years.

Vampire

Blade standing on the streets with his gun.

Finally, Loki reveals that there are real and dangerous vampires in the MCU. So far, vampires have not shown up, but a planned Blade reboot starring Mahershala Ali will change that. Blade is a half-vampire and a vampire hunter whose ability to go outside during the day gives him a major advantage over any vampires he faces. Along with typical powers like super strength and speed, Marvel vampires have the ability to hypnotize people and control creatures like bats, rats, and wolves. Blade will need to explain how vampires have remained out of the limelight before now, though the creation of the multiverse may be enough of an explanation. Destroying the TVA could be the very thing that allows for vampires in the MCU.

Next: All 14 Marvel Movies Releasing After Loki (& When)

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