Helen Mirren, Oscar-winning star of "The Queen," has swapped crown and scepter for cloak and dagger in her new role as a Nazi-hunter.

The 63-year-old British actress is in Israel this week shooting final scenes for "The Debt," about a retired Mossad femme fatale forced to make amends after bungling the capture of a German war criminal, a production source said.

"There's a lot of psychological depth and she (Mirren) is tackling this film in an intensive manner," the source said.

The Debt is an English-language remake of an 2007 Israeli drama. Filming also took place in Britain and Hungary, the production source said.

(China Daily/Agencies, March 18, 2009)