William Henry Weed, better known by the pseudonym Speed Weed, is an American television writer and producer. He is known for his work on the CBS drama NCIS: Los Angeles, Greg Berlanti's Political Animals, and for Syfy's Stephen King series Haven.

Weed got his start writing an episode of the TNT drama Saved, starring Tom Everett Scott.

He went on to work on such series as the CBS' remake Eleventh Hour and Fox's short-lived supernatural drama New Amsterdam as writer and story editor, respectively.^[1]

In 2009, he joined the new CBS series NCIS: Los Angeles as an executive story editor and writer. He wrote three episodes ("Random on Purpose", "LD50", and "Fame").^[2] The next season, he departed for NBC's long-running legal-crime series Law & Order: Special Victims Unit, as a co-producer and writer.

In summer 2012, writer/producer Greg Berlanti brought Weed aboard his USA event series Political Animals. He served as producer and wrote the episodes "Lost Boys" and "Resignation Day".

From 2013 to 2015, Weed wrote six episodes of the Syfy drama Haven ("Lost and Found", "Crush", "When the Bough Breaks", "Spotlight", "Much Ado About Mara", "Morbidity").

In summer 2015, Weed joined another series co-created by Berlanti, The CW's Arrow, as co-executive producer and writer.^[3] He first co-wrote the third episode of the fourth season, "Restoration", along with co-showrunner Wendy Mericle,^[4] and next co-wrote the seventh episode, "Brotherhood", with producer Keto Shimizu.^[5] He and co-producer Beth Schwartz wrote the twelfth episode of the season, "Unchained". It featured the return of Roy Harper.

He served as coexecutive producer for Season 1 of "The Summer I Turned Pretty."