“Shortwave” – A shortwave-centric suspense film

Many thanks to SWLing Post contributor, Richard Cuff, who notes the following recently-released suspense film:

'Shortwave' Attracts Something Sinister (Exclusive)

Funny that shortwave is being used as a medium for "something sinister." I do recall the film, Frequency, where extraordinary propagation helped a father and son communicate through time via shortwave.

I suppose, however, another recent film that brought the underground side of shortwave radio in the light was The Numbers Station with John Cusack and Malin Ackerman.

Any other shortwave-centric films I'm missing?