Mysteries at the Museum season 1 episode 6
Episode title: Spruce Goose, T-Rex Skeleton, President McKinley Nightshirt, Art Heist, Johnstown Flood, Slinky
Artifacts include the "Spruce Goose" aircraft, a T-Rex skeleton, President William McKinley's torn nightshirt, empty picture frames from an art heist, a watch from the Johnstown flood, and the invention of the Slinky.
