Ranked #10 of 10 in Season 5•−0.5 vs season avg
The Happy Face Killer: A profile of the serial killer, whose chilling confession letters to the media and prosecutors were signed off with smiley faces.
Fred Dinenage
Self - Narrator
Elizabeth Yardley
Self - Expert
Geoffrey Wansell
Self - Expert
Stuart Hamilton
Self - Expert
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"Keith Jesperson" is episode 4 of World's Most Evil Killers season 5. It scored 6.3/10 from 14 votes, ranking #10 of 10 episodes this season (season average 6.8). It aired on February 9, 2021.
