A discussion on the keeping of intelligent creatures in captivity. Employs the story of Tilikum, the notorious performing whale who, unlike orcas in the wild, has taken the lives of several people while in captivity.

"Never capture what you can't control"--Container. Originally produced in 2013. Special features: note from the director Gabriela Cowperthwaite; Kanduke; "Death by mosquito" in marine parks; Orca teeth show the stress of orcas in captivity; Recollections of a former SeaWorld trainer; The truth about wild whales; Alternatives to captivity; director and producer commentary, trailer, previews of other films.

Blackfish -- Tilikum -- Victoria B.C. -- Social intelligence -- A new home -- The party line -- Why would they lie? -- Accident history -- Public relations -- Shamu's true potential -- Reality of captivity -- End credits.