The UK trailer for “Babycall” has been released. The 2011 thriller releases theaters in the United Kingdom on March 30. Anna (Noomi Rapace) and her 8-year old son, Anders, are on the run from Anders’ violent father. They move to a secret address in a giant apartment building. Anna is terrified that her ex-husband will find them and buys a babycall to make sure Anders is safe while he sleeps. But strange noises echoe in the babycall from elsewhere in the building. Anna overhears what she believes is the murder of a child.