Comic Title: Flash #191
Publisher: DC (National Periodical Publications, Inc.)
Address: 909 Third Avenue, New York, NY
Cover Date: September 1969
On Sale Date: July 15, 1969 Copyright Date July 15, 1969
Source: Library of Congress, Periodicals 1969

Frequency: Monthly, (with the exception of Jan., July and Oct.)
Cover Price: $0.15
Page Count: 32
Editor: Julius Schwartz

Title: "How to Invade Earth -- Without Really Trying"
Pages: 23

Feature(s):
Flash (Barry Allen of Earth-1)

Writer: John Broome
Penciller: Ross Andru
Inker: Michael Esposito

Reprinted In:
Flash:The Silver Age Omnibus Vol. 3 HC (2018)

Feature Character(s)

• Flash (last appearance in World's Finest Comics #189; next appearance in Superman #220)

Guest Star(s)

• Green Lantern (last appearance in Green Lantern #71; next appearance in Justice League of America #122)

Supporting Character(s)

• Iris Allen (last appearance in Flash #190; next appearance in Superman #220)

Villain(s)

• The Mogrians (no further appearances)

Other Character(s)

• Olivia Reynolds (last appearance in Green Lantern #71; next appearance in Green Lantern #75)
• Glabr (a Lenglyn historian; no further appearances)
• The Lenglyns (no further appearances)

Synopsis:
Hal Jordan visits Barry and Iris for dinner. Iris invites a new friend Olivia Reynolds. Hal has already met Olivia, who works as a salesperson for a rival toy company. Despite the rivalry, Hal begins to like Olivia. During dinner his power ring accidentally tries to probe her mind based on a stray thought from Hal. The probe is met by feedback.

Barry and Hal leave the house to discuss things. Just then an alien invasion begins. The aliens appear to be science fiction stereotypes. In fact the leader of the aliens Glabr is merely using the attack as a diversion to prevent Flash and Green Lantern from discovering that Olivia has a U-Mind, a rare brain condition that generates life force for his people.

Barry and Hal are unable to beat the invading Mogrians who are working for Glabr. However, despite Glabr's instructions to halt the attack, the Mogrians rebel. The attack is now a real invasion. Glabr then contacts Flash and GL who find themselves powerless. Glabr helps them mentally contact Olivia who restores their powers.

Flash and Green Lantern then defeat the Mogrians. After the battle Hal uses his power ring to remove the memory from Olivia's mind. Glabr explains that the person possessing the U-Mind must remain unaware of their condition in order for it to generate life force. Glabr then departs and returns to his own planet.