Nothing goes together like love triangles and Nazi atrocities. Apparently, that’s what the makers of “The Debt” (2010) thought. What you end up with is a sorta spy movie sorta mystery sorta love story. But Helen Mirren is in it, so all is supposed to be forgiven. She plays a famous Nazi hunter with a secret. The secret unfolds in a very gripping, very interesting way, but there’s this love triangle thing that just gets in the way. It’s like the producers didn’t trust the story enough, so they had to stick something (Sam Worthington) in it to sell tickets.