Concussion Lassie : Season 4 Episode 27
TV-G (self-applied) CBS 30m
Aired: March 9th, 1958 @ 7:00 PM EST on CBS
When Timmy insists on going to a blasting site despite Lassie's protests, she is struck on the head by a dynamite-propelled rock and appears to not know who she is. Then she wanders away from the farm.
