Comic Title: Challengers of the Unknown #87
Publisher: DC (DC Comics Inc.)
Address: 75 Rockefeller Plaza, New York, NY
Cover Date: Jun/Jul 1978
On Sale Date: March 23, 1978 Newsstand Date March 21, 1978
Source: DC Coming Attractions, #16
For Release the week of March 21st

Copyright Date March 23, 1978
Source: Library of Congress, Copyright Office 1978

Newsstand Date March 21, 1978
Source: Comic Reader, #154

Newsstand Date March 20, 1978
Source: Daily Planet, Vol. 78 #11
Listed as on sale the week of March 20th

Shipping Date February 28, 1978
Source: DC Coming Attractions, #16
Shipping the week of February 28th

Frequency: Bi-monthly
Cover Price: $0.35
Page Count: 32
Editor: Jack C. Harris

Title: "Twelve Million Years to Twilight"
Pages: 17

Feature(s):
Challengers of the Unknown (of Earth-1)

Writer: Gerry Conway
Writer: Carla Conway
Penciller: Keith Giffen
Inker: John Celardo
Letterer: Ben Oda
Colorist: Jerry Serpe

Reprinted In:
Deadman Vol. 5 TPB (2014)
Swamp Thing:The Bronze Age Vol. 2 TPB (2020)
Deadman Omnibus HC (2021)

Feature Character(s)

• Challengers of the Unknown (last appearance in Challengers of the Unknown #86; next appearance in Showcase #100)
• Ace Morgan (last appearance in Challengers of the Unknown #86; next appearance in Showcase #100)
• Red Ryan (last appearance in Challengers of the Unknown #86; next appearance in Showcase #100)
• Rocky Davis (last appearance in Challengers of the Unknown #86; next appearance in Showcase #100)
• Prof. Haley (last appearance in Challengers of the Unknown #86; next appearance in Showcase #100)

Guest Star(s)

• Swamp Thing (last appearance in Challengers of the Unknown #86; next appearance in DC Comics Presents #8)
• Deadman (last appearance in Challengers of the Unknown #86; next appearance in Adventure Comics #459)
• Rip Hunter (last appearance in Challengers of the Unknown #86; next appearance in Showcase #100)

Supporting Character(s)

• June Robbins (last appearance in Challengers of the Unknown #86; next appearance in Crisis on Infinite Earths #8)

Villain(s)

• The Sunset Lords (last appearance in Challengers of the Unknown #86; no further appearances)
• The Persuader (last appearance in Challengers of the Unknown #86; no further appearances)
• Several monsters from the future (last appearance in Challengers of the Unknown #86; no further appearances)
• An army of sub-men (last appearance in Challengers of the Unknown #86; no further appearances)

Guest Appearance(s)

• Demon (last appearance in Brave & the Bold #137; next appearance in Batman Family #17)
• Lightray (last appearance in Adventure Comics #460; next appearance in Super-Team Family #15)
• Justice League of America (last appearance in Justice League of America #151; next appearance in Action Comics #480)
• Batman (last appearance in World's Finest Comics #249; next appearance in Action Comics #480)
• Green Lantern (last appearance in Aquaman #61; next appearance in Green Lantern #101)
• Elongated Man (last appearance in Justice League of America #151; next appearance in Action Comics #480)
• Jeff Smith (last appearance in Challengers of the Unknown #86; next appearance in Showcase #100)
• Bonnie Baxter (last appearance in Challengers of the Unknown #86; next appearance in Showcase #100)
• Corky Baxter (last appearance in Challengers of the Unknown #86; next appearance in Showcase #100)

Other Character(s)

• Lucas Lawspeaker and his rebels (last appearance in Challengers of the Unknown #86; no further appearances)

Comments:
Chapter 1: "Assault on Sunset"
Chapter 2: "Twilight's Last Glimmer"

This story is continued from Challengers of the Unknown #86.

Synopsis:
The Challengers escape from the prison of the Sunset Lords in the distant future. While Swamp Thing holds off an army, Rocky, Ace, and June work to destroy the equipment which threatens the 20th century. The timely arrival of Lucas Lawspeaker and his Sky-Riders turns the battle in the Challengers favor. Seeing that they are losing, the Sunset Lords prepare to destroy the city and their foes. Deadman, in the possession of Rip Hunter's body, stops them, bringing the battle to an end. The time travelers, including Rip and his team, return to their own time.

Meanwhile, in the 20th century, Red returns to Challengers Mountain in time to save Prof who is embattled by monsters sent from the future. When these monsters are defeated, Red and Prof call on the Justice League and other heroes to stop the creatures around the world.