Clue: Earth, in sci-fi

We have 2 answers for the crossword clue Earth, in sci-fi.

Possible Answers:

• SOS
• TERRA

Related Clues:

• Call to the USCG
• Mayday letters
• --- firma
• Emerg. call
• Tapped-out message
• Castaway's call
• Distress call on the ocean
• Orbiter around Sol
• Call for help
• Crisis call
• Sailor's "Help!"
• Skipper's plea
• Ship's distress call
• Message in a bottle, maybe
• (k) Help! (on a ship)
• "__ Titanic"; 1979 David Janssen movie
• Rescue me!
• "Mamma Mia!" song
• An obvious cry for help
• Signal of distress
• Help wanted notice
• Poseidon's call
• "Mamma Mia!" number
• Main message?
• Call to the Coast Guard
• ... and 138 more.

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