Star Wars Weekly 21 represents the twenty-first installment of the Marvel Star Wars UK comic book series.
Contained within this edition is the initial portion of the narrative that was originally published in the United States as Star Wars (1977) 11.
- Star Wars: A Long Time Ago... Volume 1: Doomworld
- Star Wars Omnibus: A Long Time Ago.... Volume 1
- Star Wars: The Original Marvel Years Omnibus Vol. 1
- Star Wars Legends Epic Collection: The Original Marvel Years Vol. 1
- "1. Windhölme / Cinnibar / 3: Sparta / 4: The Hollow Crown" - The seventh segment of a tale initially featured in Marvel Preview #11, showcasing Star-Lord.
- "Why Won't They Believe Me?" - The opening section of a story that initially appeared in Silver Surfer #3, belonging to the Tales of the Watcher short story collection.