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Attack of the Unknown
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You can watch Attack of the Unknown (2020) for free on Hoopla.
A SWAT team transporting a vicious crime syndicate boss must fight their way out of a county detention center during a catastrophic alien invasion.
An unexpected energy radiates from the screen as a cult icon navigates a chaotic prison breakout amidst an extraterrestrial onslaught. This frantic B-movie collision of SWAT tactics and alien terror offers pure, unadulterated genre mayhem.
Trailer
Director
Brandon Slagle
Cast
Tara Reid, Robert LaSardo, Richard Grieco, Tania Fox, Jolene Andersen, Tasha Reign, Roberta Sparta, Douglas Tait, Stacy Johnson, Elizabeth Noelle Japhet
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Attack of the Unknown
You can watch Attack of the Unknown (2020) for free on Hoopla.
Director
Brandon Slagle
Cast
Tara Reid, Robert LaSardo, Richard Grieco, Tania Fox, Jolene Andersen, Tasha Reign, Roberta Sparta, Douglas Tait, Stacy Johnson, Elizabeth Noelle Japhet
3 options ranked by value · 🇺🇸 United States
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low budget
Attack of the Unknown is streaming on Amazon Prime. Attack of the Unknown is streaming on Amazon Prime Video with Ads. Watch Attack of the Unknown for free on Hoopla. Availability last verified June 27, 2026.