The Prastaki were an alien species from the Thunderhead Spiral Galaxy.
Once Sarah Jane Smith unwillingly carried a plague of Squaleen locusts home with her after visiting a Prastaki trading ship. (PROSE: Day of the Clown)
Behind the scenes Edit
According to a DVD extra of the second series of The Sarah Jane Adventures and the SJA website, the Tunguska Scroll was salvaged from a Prastaki trading vessel in 1908.
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