Teen Titans #22 (On Sale: May 15, 1969) has another great Nick Cardy cover.
We begin with the Teen Titans in "Halfway to Holocaust" written and penciled by Neal Adams and inked by Nick Cardy. Continuing from last issue, while Speedy and Wonder Girl battle an extra dimensional creature that suddenly appears in the criminals' control-room, Robin and Kid Flash, under the control of the aliens, are used to discover a third dimensional world, invisible to the Dimension-X-dwellers, which exists adjacent to both their world and Earth. Escaping, they rejoin their teammates in this adjoining dimension, only to be pursued by the aliens.
The battle between Titans and aliens is cut short when a community-intelligence being, the sole sentient native to the newly discovered dimension, takes on the form of a giant archer in imitation of Speedy, and drives the minions of Dimension X back to their own world. Promising that never again will beings from Dimension X use his world as a gateway to Earth, the "archer" allows the Titans to depart in peace. This story has been reprinted in Best of DC #18 and Showcase Presents: Teen Titans Vol. 2 TPB.
The back-up story, "The Origin of Wonder Girl" is by Marv Wolfman, Gil Kane and Nick Cardy. This story is sort of a side story to the first story in this issue. Upon the Titan's return to Earth, Wonder Girl unexpectedly collapses, the result of a recently recurring series of fainting spells. In explanation, she tells the other Titans her origin for the first time.
As a child, she had been saved from an apartment building fire by Wonder Woman, and taken by her to Paradise Island to live after all attempts to ascertain her identity or those of her parents (presumed to be a couple killed in the blaze) had failed. Becoming Queen Hippolyta's foster daughter and Wonder Woman's foster sister, she was unable to compete with the Amazons on a physical level, lacking their special powers, and so was given powers almost identical to those of Wonder Woman by Paula, the Amazon chief scientist, using the Purple Ray.
Returning to the outside world to join the Teen Titans, she was forced to stay behind when the other Amazons sojourned to another dimension to recharge their magical powers, and had been secretly living in Titan Lair since that time. Now, she takes the name Donna Troy as a civilian identity and moves into an apartment in Greenwich Village with new girlfriend Sharon Tracy.
Later, she is contacted by Queen Hippolyta, who informs her that the Amazons' use of the Purple Ray had been accidentally responsible for her recurring weak spells, a problem which has now been corrected. Wonder Girl celebrates her new life by designing a new costume and changing her hairstyle. Reprinted in DC Special Blue Ribbon Digest #5 and Showcase Presents: Teen Titans Vol. 2 TPB.
Edited by Dick Giordano.