Helen Mirren and Jessica Chastain star in The Debt, an intriguing thriller of two halves.

Its whenThe Debtflashes forward to the 90s that the narrative stumbles.

Here, were left with a protracted and faintly ridiculous coda, with Helen Mirren playing the 50-something Rachel.

Instead, what we have is a mildly diverting thriller sandwich.

Rating:

3 out of 5