Can't Believe It's Saturday

 is the fourth one-hour crossover special in a series of Star Teens: Power Hour specials that features characters from Star Teens in Space and those from the Cartoon Network series, "The Secret Saturdays".

Summary
The Space Teens help the Saturday family to track down a bat monster that causes a global standstill to every human and animal population on earth.

Characters

 * Marla Reynolds
 * Nikki Fox
 * Valerie Lincoln
 * Ursula Bennett
 * Jenna Campo
 * Ozymandias
 * E.R.L.I.K
 * Lagom Saylu
 * VIGA
 * Zak Saturday
 * Doc Saturday
 * Drew Saturday
 * Fiskerton
 * Komodo
 * Zon
 * V.V. Argost

Voice Cast

 * Corey Burton - V.V. Argost
 * Diedrich Bader - Fiskerton
 * Fred Tatasciore - Komodo, Zon, E.R.L.I.K.
 * Grey Griffin - Nikki Fox
 * Kari Wahlgren - Ursula Bennett
 * Lacey Chabert - Valerie Lincoln
 * Laura Bailey - Jenna Campo
 * Mark Hamill - Ozymandias
 * Matt Smith - VIGA
 * Nicole Sullivan - Drew Saturday
 * Nolan North - Lagom Saylu
 * Phil Morris - Doc Saturday
 * Sam Lerner - Zak Saturday
 * Tara Strong - Marla Reynolds

Trivia

 * The original cast members from "The Secret Saturdays" reprise their roles of the show's main cast for this episode.