Fair rating?Smallville· Season 4 · Episode 19
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Clark's entire memory ends up getting erased when he confronts a thief who has a kryptonite-based ability to wipe out people's short-term memories. As Clark learns about his life, he's shocked to discover that he has superpowers.
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#3In Season 4of 22 rated episodes
#5All-timeof 217 rated episodes
+0.4vs season avgSeason 4 averages 7.9
2005First airedApril 27, 2005
Guest stars
Erica Duranceas Lois Lane
Camille Mitchellas Sheriff Nancy Adams
Jonathan Bennettas Kevin Grady
Tom Butleras Lawrence Grady
Heather Doerksenas Erica Poss
Ryan Kingas Dillon GradyCrew
Jeannot SzwarcDirectorBrian PetersonWriter
Kelly SoudersWriterShows like Smallville
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