In this efficient “hitman with a heart” tale from director Reem Morsi, The Last Mark is a confined thriller starring a conflicted crook (Shawn Doyle) and a kidnapped call girl (Alexia Fast) reeling for a “job” that went sideways after the escort witnesses the murder.  The characters hide out at a safe house arranged by a fixer (Ashgrove’s Jonas Chernick) to escape the hitman’s unpredictable partner-in-crime (Bryce Hodgson).  The dynamic between the unlikely fugitives is deliberately…