[1] Dr. Walter 'Walt' Langkowski is a founding member of Alpha Flight, a native of Vancouver, British Columbia, Canada, renowned physicist, and professor at McGill University.

In an attempt to replicate the process that transformed Bruce Banner into the Hulk, Langkowski bombarded himself with a gamma ray projector at an isolated laboratory near the Arctic Circle.

As a founding member of the Canadian superhero team Alpha Flight, Sasquatch battled the X-Men in an attempt to capture Wolverine.

[2] The fight between the two teams caused a huge amount of property damage at the Calgary Stampede shopping area, as well as the loss of a DC-10 that Sasquatch flung into a hangar.

However, a preservation spell cast by Alpha Flight's sorcerer Shaman failed to prevent Langkowski's body from crumbling to dust.

[12] Containing Walter's soul within a globe of its own from his pouch, Shaman then transported Alpha Flight back to Earth, where they met with Heather Hudson and Box.

[12] After searching for a habitable but mindless body, Langkowski and Box's creator, Roger Bochs, eventually found a nearly-mindless humanoid in another dimension.

Among his later adventures with Alpha Flight, Walt battled Llan the Sorcerer,[20] then joined the Avengers, and the People's Protectorate against the Atlantean army, the Peace Corpse, and the Combine.

Along with Major Mapleleaf, Puck (both Eugene Judd and Zuzha Yu), Vindicator, Shaman, and Guardian, Sasquatch fights The Collective.

Following the events of the 2006 "Civil War" storyline, Langkowski is recruited by the Canadian government to form a new team called Omega Flight.

[volume & issue needed] During the 2010 "Chaos War" storyline, Sasquatch made a deal with the Great Beasts, bringing them to Earth so they can kill Amatusu-Mikaboshi.

[25] During the 2011 "Fear Itself" storyline, Sasquatch was seen helping Alpha Flight fight Attuma (in the form of Nerkodd: Breaker of Oceans) while saving people from a cataclysmic flood.

Once Nerkodd was defeated, Alpha Flight was almost immediately betrayed by former ally Gary Cody and his newly elected Unity Party.

[27] At Parliament Hill--the heart of the Canadian government--Walt is told by Agent Jeff Brown that concussions sustained when he played football will cause him to act less human when he changes back into Sasquatch.

While taking time off from the Alpha Flight space program, Walt met a reporter named Jackie McGee and agreed to aid her in her search for Bruce Banner.

After killing doctors that were treating him, Sasquatch encounters Hulk who realized Walt was possessed by Brian Banner's ghost.

[31] General Reginald Fortean nearly charged Walter for the deaths he caused but changed his mind; instead, he had Captain Marvel send the Avengers after Hulk.

[35] With Titania as its latest member, Walter and Gamma Flight ran into Doc Samson who revealed Hulk's plan to wipe out human civilization.

[36] Arriving in Reno, Nevada, Walt and Gamma Flight found the Subject B husk in which the U.S. Hulk Operations placed Rick Jones' body.

[41] Although Reed Richards promised to restore them to their own bodies, Walt Samson was still with Alpha Flight when the team pretended to work alongside the mutant-extermination coalition Orchis.

[volume & issue needed] As Sasquatch, Langkowski possessed abnormal strength and stamina, as well as resistance to injury (in an early appearance, he fought the Hulk for "fun" in order to test his limits).

He is strong enough to pull a naval destroyer ashore for repairs,[42] as well as hold a DC-10 cargo plane against the thrust of its engines and then hurl it over 1,000 feet backward.

A white-haired entity who appears to be Walter Langowski joins the Exiles, an interdimensional team of heroes dedicated to fixing breaks in the timeline.

[volume & issue needed] It is soon revealed that she is a black woman named Heather Hudson, shocking the team who are familiar with versions of Walter.

[volume & issue needed] In the Marvel Zombies comics set in the universe of Earth-2149, the zombified Alpha Flight attack the X-Men and are eventually killed by Magneto.

[volume & issue needed] Sasquatch is seen in a panel of Marvel Zombies Dead Days attacking the X-Man Wolverine.

[volume & issue needed] In the possible future timeline seen in the second Old Man Logan ongoing series, it is revealed that Sasquatch and his fellow Alpha Flight members were killed by unknown villain opponents when the supervillain uprising had occurred.

Old Man Logan experiences this illusion while he and Puck are taking part in a rescue mission on a space station that was attacked by the Brood.

[volume & issue needed] The character is later revealed to be Rahne Sinclair, under the influence of the power-enhancing drug Banshee that enabled her to assume a Bigfoot-like form.

[citation needed] Sasquatch appears in the Wolverine versus Sabretooth motion comic, voiced by Trevor Devall.