Highlander: The Raven

So Shall Ye Reap 1 Season 5 Episode

A scientist is killed while working on some kind of agricultural project. It turns out he is the son of Charlie, an old man and a normal mortal who knew Amanda (and found out she was Immortal) back in the 1960's. Charlie was a spy back then. He believes his son was murdered, so Amanda ropes Nick in to investigate. It turns out the scientist, Charlie's son, was only one of several people working on a project who have died mysteriously. The Federal government is involved in some manner, and Nick and Amanda have to duck spook-killers repeatedly. They eventually find out that the government was working on a project to create estrogen-laced wheat seeds that can be used against enemy nations to render them literally sterile. Nick and Amanda turn the evidence over to the media to avoid being killed by the agents. The head agent, who was responsible for the death of Charlie's son, gets off from the grand jury, and Charlie kills him at the cost of his own life, leaving only Amanda to mourn. C