IN THEATERS THIS WEEKEND-- OPENING IN WIDE RELEASE

Big Mommas: Like Father, Like Son (PG-13)
Martin Lawrence must go undercover again, this time with his teenage stepson, at an all-girls' school to catch a murderer. Also stars Brandon T. Jackson, Jessica Lucas, Faizon Love, Emily Rios. (PROJECTION: $20 MILLION.)
 
I Am Number Four (PG-13)
A mysterious young fugitive with extraordinary powers must stay one step ahead of ruthless enemies sent to destroy him. Stars  Alex Pettyfer, Timothy Olyphant, Teresa Palmer, Dianna Agron, Kevin Durand. (PROJECTION: $20 MILLION.)
 
Unknown (PG-13)
Liam Neeson stars as a doctor who wakes up from a car accident to discover that another man has assumed his identity. Also stars January Jones, Diane Kruger, Aidan Quinn, Frank Langella. (PROJECTION: $17-$20 MILLION.)