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.
Where to Watch Concussion
Cast of Concussion
Jon ProvostTimmy Martin
Hugh ReillyPaul Martin
George ClevelandGeorge 'Gramps' Miller
Josh AlbeeMike Bishop
Tommy RettigJeff Miller
Arthur Space
Roy Barcroft
Gilman Rankin
Ralph Votrian
Philip FordDirector
Robert LeesWriter
Rudolph E. AbelProducer
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