 Walter cuts off his hand and tells Astrid to not tell anyone, until in Five-Twenty-Ten, he used it to unlock a storage facility and retrieve part of the plan.Brandon Fayette (portrayed by Ryan McDonald) is the leading scientist at Massive Dynamic, offering assistance to the Fringe team on multiple occasions.The Other Universe version of Brandon is the chief scientist of the Fringe division, often answering directly to Secretary Bishop, and responsible for the assimilation of Olivia into Fauxlivia.