This week's "What to Watch" segment on KSL 5 TV sees Kenneth Branagh return as Hercule Poirot in Agatha Christie's 'Death on the Nile', J-Lo and Owen Wilson trying to cope with marriage-at-first-sight in 'Marry Me', Charlie Day and Jenny Slate trying to break up their exes new relationships in 'I Want You Back', and Grace Kaufman navigating teenage grief and love in 'The Sky Is Everywhere'.