Comic Title: Superman #17
Publisher: DC (Superman, Inc.)
Address: 480 Lexington Avenue, New York, NY
Cover Date: Jul/Aug 1942
On Sale Date: May 6, 1942 Newsstand Date May 6, 1942
Source: House Ad, Action Comics #49, Page 16

Copyright Date May 5, 1942
Source: Library of Congress, Periodicals 1942
Until 1958 DC did not report actual on sale dates to the copyright office
The publication dates listed in LoC records are NOT release dates.

Frequency: Bi-monthly
Cover Price: $0.10
Page Count: 64
Editor: Fredric Whitney Ellsworth

Title: "When Titans Clash"
Pages: 13

Feature(s):
Superman (of Earth-2)

Writer: Jerry Siegel
Artist: John Sikela

Reprinted In:
Superman #252 (1972)
Superman Archives Vol. 5 HC (2000)
Superman Chronicles Vol. 9 TPB (2011)
Lex Luthor:A Celebration of 75 Years HC (2016)
Superman:The Golden Age Omnibus Vol. 3 HC (2017)
Superman:The Golden Age Vol. 5 TPB (2020)

Feature Character(s)

• Superman (last appearance in Superman #17; next appearance in All-Star Squadron #21)

Supporting Character(s)

• Lois Lane (last appearance in Superman #17; next appearance in World's Finest Comics #6)
• Perry White (last appearance in Superman #17; next appearance in World's Finest Comics #6)

Villain(s)

• Luthor (last appearance in Action Comics #47; next appearance in Superman #18)
• Luthor’s men (no further appearances)

Other Character(s)

• An unnamed prison warden (no further appearances)

Comments:
This story is a sequel to the Powerstone story seen in the first story of Action Comics #47.

The events of this story occur concurrently with All-Star Squadron #20 where they are recapped.

Superman encounters the Ultra-Humanite, who steals the Powerstone, immediately after this story as told in All-Star Squadron #21.

Synopsis:
Luthor is sentenced to the electric chair for execution. However instead of killing him, the electrical energy restores Luthor’s artificial super powers. He still can not best the Man of Steel, but he tricks Superman into delivering the Powerstone.

With the Powerstone in his possession Luthor robs Superman of his powers and becomes a terrible menace. However, even without powers, the Man of Steel stands against his foe. Using trickery, Superman separates Luthor from the Powerstone, removing Luthor’s power and restoring his own. He is then able to defeat the villain.