Forgive my indulgence in an old Jewish folk song in the title—it just seemed to fit the plot of last night’s episode of Eleventh Hour so neatly. We open on a helicopter pilot who died in a fiery crash after mercury poisoning caused him to go blind mid-flight. Soon, other people in the town start showing symptoms of the same contamination, forcing Hood and Young and the newly introduced Felix Lee to trace the mercury down the food chain. Here’s what they found by the end: Mercury in Lake Michigan -> maggots -> herring -> fish meal -> dairy cows ->milk -> people.

