Star Trek: Voyager: Scorpion

"Scorpion" is the 26th episode of the third season and the first episode of the fourth season of the American science fiction television series Star Trek: Voyager, the 68th and 69th episode overall. It introduces the Borg drone Seven of Nine and Species 8472 to the series. Set in the 24th century, the series follows the adventures of the Starfleet and Maquis crew of the starship USS Voyager after they were stranded in the Delta Quadrant far from the rest of the Federation. In this episode, the Federation starship Voyager makes a "pact with the devil" (i.e. the Borg) in order to combat a new enemy which poses a serious threat to both.