Silent witness. The complete season four

Summary: "Forensic pathologist Dr. Sam Ryan (Amanda Burton) has forged a career as a London University professor. Still, she can<U+2019>t resist consulting on three cases that draw her into a web of intrigue, half-truths, and dangerous liaisons. First, did drugs, alcohol, or a heart attack cause a helicopter pilot to crash, or is there something darker afoot? Next, can a long-buried body pulled from a bog help her crack a modern gangland murder? Finally, is the unidentified victim of a cinema fire connected to a years-old murder case? As passion and professionalism blur, Sam finds herself drawn both to ex-flame DCI Michael Connor and convicted killer Chris Caldwell, but with what consequences?"--Container.