Watch Critters Attack! for Free: How to Stream the Movie Online at 123Movies. . Follows 20-year-old Drea, who reluctantly takes a job babysitting for a professor of a college she hopes to attend. Struggling to entertain the professor's children Trissy and Jake, along with her own little brother Phillip , Drea takes them on a hike, unaware that mysterious alien critters have crash-landed and started devouring every living thing they encounter.