Cheakamus Centre as Summerland
David sits by on the dock while Melanie listens to the coffee machine. Later Syd and David land in the water after teleporting out of the building during a stressful session.
“Chapter 3” Filming Locations
Melanie decides to accelerate David's memory work in response to his sister's kidnapping but they run into a series of mysterious blocks in his mind.
Legion episode “Chapter 3” was filmed in Vancouver, Squamish, & West Vancouver in Canada.
Whytecliff Park as Beach
Young David and Amy play with their dog on the beach.
104 West 11th Avenue as Trick or Treating
David has a memory of following his dog through the fence to a creepy house on halloween.
Source: What's Filming
Beneath Main Street Overpass as Sketchy Underpass
David sits on the couch in a drug high while Lenny cooks on the stove they brought.
Alley (south of Alexander, west of Gore) as Alley
Lenny rolls David down the alley in a shopping cart while Syd, Melanie, and Ptonomy walk past. Melanie introduces Syd to child-David and Syd gives him a hug.
Source: What's Filming