Ranked #1 of 6 in Season 1•+0.4 vs season avg
These killers lie dormant, waiting for the right time to strike. Eleven-month-old Garrett Richardson ingests the eggs of a worm, and within days the creature travels to his brain and goes about feeding on its tissue. A Vietnam veteran survived the enemy attacks on the
Jason Done
Self - UK Narrator (voice)
Justin Peed
Self - Narrator (voice)
Dan Riskin
Self
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"Sleeper Cells" is episode 1 of Monsters Inside Me season 1. It scored 7.4/10 from 26 votes, ranking #1 of 6 episodes this season (season average 7.0). It aired on July 1, 2009.