The IMG-099 Imperial Mark IV patrol droid was a model of surveillance droids used by the Galactic Empire during the Galactic Civil War. Following a battle between the CR90 corvette Tantive IV and the Star Destroyer Devastator over Tatooine, the Empire dispatched Mark IVs to look for two droids, R2-D2 and C-3PO, who carried stolen plans for the Death Star.
- Star Wars: Episode IV A New Hope (First appearance)
- Star Wars in 100 Scenes (As "Mark IV Sentry Droid")
- Star Wars: Complete Locations
- Star Wars: The Visual Encyclopedia (First identified as IMG-099 Imperial Mark IV patrol droid)