From NetFlix:

Richard Hannay (Rupert Penry-Jones) has his holiday interrupted when secret agent Scudder (Eddie Marsan) bursts into his apartment, staying alive just long enough to deposit a notebook. Pegged with murder, Hannay must decode the book and nab the culprits — before they find him first. In this nimble BBC update of John Buchan’s novel, German spies and British police give chase as Hannay races to deliver the coveted code and avert a world war.

Rupert Penry-Jones and Matthew MacFadyen take turns starring in the excellent British TV series MI-5 . That series started in 2002. Since this Masterpiece Classic was made in 2008, I assume these two actors rotate in order to give them time to do other acting.

Think of “The 39 Steps” as a Harlequin Spy Romance with possibly its tongue in its cheek. Penry-Jones is accidentally thrust into an effort to prevent Germany from attacking the British navy just prior to World War I. He gets to run up and down hills, run through woods, drive vintage cars in exciting 20 mph car chases, solve encrypted messages, discover spies, and woo a winsome maiden, all the while remaining a presentable handsome Brit with a flare for witty comebacks.

If you can stand not having digital special effects enhance the performance of the actors, then you might enjoy this melodrama, despite a few “aw shucks!” moments.