The text you requested refers to the third episode of the second season of the sci-fi television series Dark Angel , titled Originally aired on October 12, 2001, this episode is a pivotal moment in the series that explores the precarious early alliance between the protagonist Max and the Manticore turncoat Alec. Episode Overview: "Proof of Purchase"

In this episode, the narrative follows three major threads that deepen the show's post-apocalyptic lore:

: Max (Jessica Alba) and Logan (Michael Weatherly) search for Joshua, the canine-enhanced transgenic who helped Max escape. They discover Joshua is on his own hunt to find his "father" or creator, Sandeman.

"Proof of Purchase" is noted by reviewers for advancing the "Sandeman mystery" and establishing the complex, often adversarial chemistry between Max and Alec. Although the show was canceled after its second season, this episode remains a fan favorite for its high stakes and character development. "Dark Angel" Proof of Purchase (TV Episode 2001) - IMDb