- On May 19, 1946, Columbia Workshop broadcast an adaptation of The Trial by Davidson Taylor with an original musical score by Bernard Herrmann and starring Karl Swenson as Joseph K.
- In 1982, Mike Gwilym starred as Josef K with Miriam Margolyes as Leni in a adaptation on BBC Radio 4 dramatised for radio by Hanif Kureishi.
- Sam Troughton starred as Joseph Kay in a new adaptation by Mark Ravenhill titled The Process directed by Polly Thomas and broadcast on 10 May 2015 on BBC Radio 3's Drama on 3 program.
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