"The Man Who Wouldn't Tell"
Season 2, Episode 20
Air date March 31, 1978
Written by Anne Collins
Director Alan Crosland
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"Seance of Terror"
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"The Girl from Ilandia"

A janitor accidentally mixes cleaning supplies and creates a powerful explosive. Wonder Woman must protect him from evil-doers who are after the secret formula.


  • Lynda Carter as Diana Prince / Wonder Woman
  • Lyle Waggoner as Colonel Steve Trevor, Jr.
  • Jane Actman as Meg
  • Philip M. Thomas as Furst
  • Michael Cole as Ted
  • Millie Slavin as B.W.
  • Gary Burghoff as Alan
  • Saundra Sharp as Eve
  • Tony Brubacker as Tom
  • Lonny Chapman as Hopewell International Chairman (uncredited)
  • Tom Kratochvil as Irac (voice) (uncredited)
  • Joseph Ruskin as Dr. Black (uncredited)

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