Ron Savage directed a zoom based horror feature during the pandemic followed by a found footage film with very good results. With his new film "Other Mommy" as his first foray into studio features, he ups the game under the auspice of Atomic Monster and Blumhouse.. "Other Mommy" has its issues but it also has its strengths to be sure. Jessica Chastain plays dual roles in a way and understands the assignment without overdoing it.