“Let Him Go” (** out of four) was a moody but muted melodrama about a retired sheriff (Kevin Costner) and his wife (Diane Lane) grieving over the death of their son who embark on an odyssey to find their only grandson when his caretaker suddenly takes off with him which questions the strength and fabric of their relationship. Sober and somber but heavy-handed and sluggish and not all that moving. A disappointing reteaming of Costner and Lane who both played Superman’s parents in “Man Of Steel.” Guy Godfree’s crisp cinematography is an undeniable standout.