2011’s Dolphin Tale was Warner Brothers’ throwback (splashback?) to its earlier Free Willy series, or those old Disney programmers: cute moppet tended wounded critter back to health, this time in the bright, shiny confines of a Tampa aquarium. The sequel pretends Blackfish never happened, instead dramatising the efforts of a conscientious team of professionals to coax the now merely depressed dolphin Winter into putting on another show. Mild fun ensues, but even the returning players can’t divert us from all its narrative water-treading: the film has one comedy pelican, two wise old buzzards (Morgan Freeman, Kris Kristofferson) and a slovenly kind of porpoise.