I'm looking for an interesting movie to watch?

Northern Pursuit (1943)

At Dawn We Die (1943)

They Came to Blow Up America (1943)

Resisting Enemy Interrogation (1944) on youtube

13 Rue Madeleine (1946)

Odette (1950)

Decision Before Dawn (1951)

Carve Her Name with Pride (1958)

I've see all these and they are all good.

Mata Hari 1931

The Spy Who Came in from the Cold 50's

Grand Hotel 1932

Long Voyage Home 40's

Mrs Miniver 40's

The Man Who Knew Too Much

Caberet

The Third Man

The 34 Steps 40's HItchcock

13 Rue Madeleine James Cagney

13 Rue Madeleine, with Jimmy Cagney - great movie.

One I really liked is "The Man Who Never Was" - 1956 ‧ Drama/War. Based on a true story.

"Early in 1943, Allied forces were massing along the coast of North Africa, preparing to make a push across the Mediterranean. They’d settled on strategically important Sicily as a target… but they needed to convince the Germans that they were aiming somewhere else. How did they do it? "

It was made into a documentary in 2010 and called "Operation Mincemeat".

Saving private Ryan

Yes

Hacksaw Ridge was set in WWII. Good war movie, not an older movie and not about a spy but still...