Comic Title: Green Lantern #68
Publisher: DC (National Periodical Publications, Inc.)
Address: 909 Third Avenue, New York, NY
Cover Date: April 1969
On Sale Date: February 25, 1969 Copyright Date February 25, 1969
Source: Library of Congress, Periodicals 1969

Newsstand Date February 25, 1969
Source: Comic Reader, #71

Frequency: Monthly, with the exception of February, May, August, and Nov.
Cover Price: $0.12
Page Count: 32
Editor: Julius Schwartz

Title: "I Wonder Where the Yellow Went"
Pages: 23

Feature(s):
Green Lantern (Hal Jordan of Earth-1)

Writer: Dennis J. O'Neil
Penciller: Gil Kane
Inker: Joe Giella

Reprinted In:
Showcase Presents:Green Lantern Vol. 4 TPB (2009)
Green Lantern:The Silver Age Omnibus Vol. 2 HC (2018)

Feature Character(s)

• Green Lantern (last appearance in Justice League of America #70; next appearance in Justice League of America #71)

Supporting Character(s)

• Guardians of the Universe (last appearance in Green Lantern #64; next appearance in Green Lantern #70)
• Eve Doremus (last appearance in Green Lantern #65; no further appearances)
• Mark Doremus (last appearance in Green Lantern #64; no further appearances)
• Mr. Lawford (last appearance in Green Lantern #62; no further appearances)

Villain(s)

• Commander Calibax and a group of space outlaws (no further appearances)
• Winky Eiler and his gang (no further appearances)

Other Character(s)

• A mailman (no further appearances)
• Tommy and several Green Lantern fans (no further appearances)

Synopsis:
Green Lantern pursues a gang of space outlaws into a field of meteors. One of the meteors is made of sulphur. When it explodes Green Lantern is caught in a cloud of yellow gas which allows one of the outlaws to make it to Earth.

Unable to find the outlaw, Green Lantern returns to Evergreen City and is approached by Professor Cally. The man claims to have discovered a filter which will remove the power ring's yellow vulnerability. Green Lantern agrees to test the filter over the next week with promising results.

A week later, while Green Lantern is battling a group of gangsters his ring begins to weaken. Professor Cally then reveals himself to be the space outlaw Commander Calibax, who has discovered that the filter will destroy a power ring over time. Without his ring, Green Lantern is nearly killed. Calibax then threatens Eve Doremus and her father, but GL is able to beat him using only his wits and fists. After Calibax is safely in custody, the Guardians provide Hal with a new power ring.