Comic Title: Adventure Comics #380
Publisher: DC (National Periodical Publications, Inc.)
Address: 909 Third Avenue, New York, NY
Cover Date: May 1969
On Sale Date: March 27, 1969 Newsstand Date March 27, 1969
Source: House Ad, Phantom Stranger #1, Page 30

Copyright Date March 27, 1969
Source: Library of Congress, Periodicals 1969

Newsstand Date March 27, 1969
Source: Comic Reader, #72

Frequency: Monthly
Cover Price: $0.12
Page Count: 32
Editor: Mort Weisinger

Title: "The Legion's Space Odyssey"
Pages: 23

Feature(s):
Legion of Super-Heroes (of Earth-1)

Writer: James Shooter
Penciller: J. Winslow Mortimer
Inker: Jack Abel

Reprinted In:
Legion of Super-Heroes Archives Vol. 9 HC (2000)
Showcase Presents:Legion of Super-Heroes Vol. 4 TPB (2010)
Legion of Super-Heroes:The Silver Age Omnibus Vol. 3 HC (2020)

Feature Character(s)

• Legion of Super-Heroes (last appearance in Adventure Comics #379; next appearance in Action Comics #378)
• Cosmic Boy (last appearance in Adventure Comics #376; next appearance in Action Comics #386)
• Invisible Kid (last appearance in Adventure Comics #379; next appearance in Superboy #176)
• Duo Damsel (last appearance in Adventure Comics #379; next appearance in Action Comics #380)
• Superboy (last appearance in Superboy #155; next appearance in Superboy #157)
• Sun Boy (last appearance in Adventure Comics #375; next appearance in Action Comics #387)
• Bouncing Boy (last appearance in Adventure Comics #376; next appearance in Action Comics #380)
• Mon-El (last appearance in Adventure Comics #375; next appearance in Action Comics #379)
• Ultra Boy (last appearance in Adventure Comics #379; next appearance in Action Comics #381)
• Lightning Lass (last appearance in Adventure Comics #375; next appearance in Action Comics #378)
• Dream Girl (last appearance in Adventure Comics #374; next appearance in Action Comics #379)

Supporting Character(s)

• Legion of Super-Pets (last appearance in Adventure Comics #364; next appearance in Action Comics #387)
• Proty II (last appearance in Adventure Comics #376; next appearance in Action Comics #387)
• Krypto (last appearance in Adventure Comics #364; next appearance in Action Comics #387)
• Comet (last appearance in Superman's Girl Friend Lois Lane #92; next appearance in Action Comics #387)
• Streaky (last appearance in Adventure Comics #364; next appearance in Action Comics #387)
• Super-Monkey (last appearance in Adventure Comics #364; next appearance in Action Comics #387)

Villain(s)

• Skyzznx and Alrrk (both die in this story; no further appearances)

Other Character(s)

• Robot duplicates of Ultra Boy, Cosmic Boy, and Duo Damsel (destroyed in this story; no further appearances)

Comments:
Part II:"The Building of the Ship"
Part III:"No Welcome for the Wanderers"

Synopsis:
Dream Girl contacts Superboy to tell him about a prophetic dream. Moments later eight Legionnaires including Superboy are teleported to a remote planet. While scouting the area, the team encounters a monstrous creature which kills the Boy of Steel with its Kryptonite teeth.

The other Legionnaires build a memorial to their fallen teammate. They then construct a space ship to carry them home. Ultra Boy launches the ship into space, but their journey home is stalled when a meteor damages the ship.

The Legionnaires land the ship on another planet to make repairs. A storm threatens rages, leaving Duo Damsel and Bouncing Boy in peril, but a sudden whirlpool saves them. After repairs are made, the Legionnaires finish the trip back to Earth.

When they reach Earth, they are denied permission to land. Ultra Boy then witnesses robot doubles of themselves being destroyed. The Legionnaires then lands and are surprised to find Superboy alive. The Boy of Steel explains that he and the Legion of Super-Pets were responsible for the team's exile. They were acting to protect them from a threat perpetrated by two would-be conquerers as foreseen be Dream Girl.

The Legion then regroups to find the conquerers who are hiding on the surface of the sun. Instead of allowing themselves to be captured, the villains kill themselves without explanation.