"The Final Act" is the splendid concluding episode of a (generally) gripping series. As in the very best crime dramas, the focus really isn't the plot or the "whodunnit?" but the character of the central players. And if Helen Mirren almost eclipses them, that's only a bonus for the viewer. The tension is generated not by the crime plot (which is serviceable but predictable) but from Mirren's gripping portrayal of the powerful and all-too-human Jane Tennyson who treads the tightrope of her final days in her career. She somehow manages to give us a woman who balances the angels and the devils in her character without once lapsing into the predictable or the incredible. And THAT's what keeps you leaning forward in your seat.

God, but she's good!