Peter Firth's final hour as Harry Pearce.

“YOU and I, we’re made of secrets.”

Ruth Evershed and Harry Pearce face the final curtain together.

Standing by a familiar estuary as we hold our breath to see what will happen.

Spooks series 10, last ever episode.

The Grid: Class of 2011

HARRY and Ruth are sitting together on a park bench.

Ruth: “Do you know what it’s like to feel something for someone and then one day realise you don’t even know them?”

Harry: “You do know me. You know all the important things.”

Spooks series 10, episode four.

In which we learn battle-weary Sir Harry has so many more secrets.

Harry Pearce (Peter Firth) and Ruth Evershed (Nicola Walker)

“NOT while I still draw breath.”

Sir Harry Pearce is a joy to behold in the first episode of the last ever series of Spooks.

With just six hours left before we say goodbye, the writers of our favourite spy drama appear intent on celebrating the man who has been there from the very start.

Or perhaps more accurately, a skilled actor by the name of Peter Firth.