Wallander (2008) (2008)

S4E3 The Troubled Man

Though his memory is deteriorating and he's no longer on active duty, Wallander taps into all his skills to search for Linda's missing father-in-law, a former high-ranking member of the Swedish navy fixated on a submarine mystery from years past. As he struggles to maintain his grasp on reality, Wallander feels an urgent need to crack this final case.