The Avengers #122

"TRAPPED in Outer Space!"

Members of the Zodiac Cartel and the Avengers were both shot into space in a booby-trapped warehouse by the Zodiac leader, Taurus. After a short battle, the Avengers and Zodiac decide to focus their energies on finding a way back to Earth in order to stop Taurus.

Meanwhile on Earth, Zodiac member Libra decides to stop remaining neutral on the current events and (with the aid of Gimini's twin brother) work to help the Avengers and Zodiac get back to Earth. Once on Earth, they confront Taurus one more time, and during the fight he is knocked into the water. The Vision freezes and is unable to bring himself to save Van Lunt, leaving Mantis to rescue him.

With the Zodiac defeated, Libra reveals the real reason why he helped save the Avengers: That he is the father of Mantis.