How many movies have Allister Foster and Lucia Walters collaborated on?

They have worked on 4 movies together! Their first movie together was Hailey Dean Mysteries: 2 + 2 = Murder (2018) while their highest rated movie together was Hailey Dean Mysteries: Death on Duty (2019). They have not worked together since Crossword Mysteries: Riddle Me Dead (2021). They are most known for their mystery films together.