“Suicide Squad,” out Tuesday on home video, had promise: DC Comics’ “baddest of the bad” are temporarily sprung from prison to fight forces even more evil than they are. But the poorly paced story — in which the creepy Enchantress tries to take over the world — amounts to lots of walking and talking with occasional supernatural outbursts.

An extended cut on the Blu-ray just adds to the tedium. Even the novelization struggled to make sense of the story.

Margot Robbie as the Joker’s crazed sexpot, Harley Quinn, and Will Smith as the right-on-target Deadshot marginally salvage a disappointing show.