Comic Title: Booster Gold #21
Publisher: DC
Cover Date: October 1987
On Sale Date: July 14, 1987 Newsstand Date July 14, 1987
Source: DC Releases, #41

Newsstand Date July 14, 1987
Source: Amazing Heroes, #121

Shipping Date June 23, 1987
Source: DC Releases, #41

Shipping Date June 23, 1987
Source: Amazing Heroes, #121

Shipping Date June 23, 1987
Source: Focus, #1, Page BC

Shipping Date June 23, 1987
Source: Capital City Distributors, Orderpack June 1987

Copyright Date June 23, 1987
Source: Library of Congress, Copyright Office 1987
DC publication dates beyond April 1981 listed by the LoC
represent shipping dates NOT newsstand sale dates

Cover Price: $0.75
Page Count: 32
Editor: Barbara J. Kesel (Randall)

Title: "Invasion from Dimension X"
Pages: 22

Feature(s):
Booster Gold (Post-Crisis)

Writer/Penciller: Dan Jurgens
Inker: Ty Templeton
Letterer: Steve Haynie
Colorist: Eugene D'Angelo

Reprinted In:
Showcase Presents Booster Gold Vol. 1 TPB (2008)
Booster Gold:Future Lost HC (2020)

Feature Character(s)

• Booster Gold (last appearance in Booster Gold #20; next appearance in Booster Gold #22)

Supporting Character(s)

• Trixie Collins (last appearance in Booster Gold #20; next appearance in Booster Gold #22)
• Dirk Davis (last appearance in Booster Gold #20; next appearance in Booster Gold #22)
• Jack Soo (last appearance in Booster Gold #20; no further appearances)
• Skeets (last appearance in Booster Gold #20; next appearance in Booster Gold #22)
• Michelle Carter (last appearance in Booster Gold #20; next appearance in Booster Gold #22)

Villain(s)

• Aliens from Dimension X (Rangor and Belan named; next appearance in Booster Gold #22)

Guest Appearance(s)

• Wonder Girl (last appearance in Flash #6; next appearance in New Teen Titans #36)

Other Character(s)

• Mackenzie Garrison (the newly appointed VP of BGI; next appearance in Booster Gold #22)
• An unnamed sheriff (no further appearances)

Comments:
This story is continued in part from Booster Gold #20 and continues in Booster Gold #22.

Synopsis:
After recovering his lost eyesight, Booster Gold begins searching for his missing sister. He traces her to a motel in Minnesota which contains a gateway to Dimension X. An alien from that dimension attacks Booster, then kills himself when he realizes that he can't win the fight. Booster finds a ticket stub on the alien's body.

Booster contacts Wonder Girl for information about the alien who mentioned previous encounters with the Teen Titans. He then rushes to the Metrodome where another gateway still exists. Booster enters the portal, makes his way through the space between dimensions, and arrives in Dimension X. He finds his sister a prisoner of the aliens and is given the choice to save her or a stadium full of people back on Earth.