There was a movie made in the early 90"s starring the late John Ritter,
where he poisons his wife with old radio parts, and he is shown
scraping away at the deadly selenium rectifier.

Ok so it's Marg Helgenberger and a TV show in the late 90's. Here's the
link.
http://www.google.com/url?sa=D&q=htt...org/tvshow.htm.