Midsomer Murders S12 E04 The Glitch

"The deadliest county in England."

Midsomer University science fellow George Jeffers threatens to make public a problem with his state-of-the-art invention Kernel Logic, but American software boss Clinton Finn fears he will lose millions if the truth comes out. When a schoolteacher is killed in a hit-and-run, Barnaby suspects Jeffers was the intended target.