Dr Chris Smith and the Naked Scientist team look at the warning signs of bowel cancer, whether the so-called “runners high” exists, and following claims of war crimes committed by Vladimir Putin's forces in Ukraine how forensic archaeologists can help uncover evidence of what’s happened.

This episodes looks in detail at how forensic investigators examine a crime scene, and contains graphic descriptions of violence and how the victims died. If you have children listening you may want to skip this one.