That replicant, Leon Kowalski, was the one who violently escaped in the opening moments of the film after being asked about his mother, setting up the notion that these androids were capable of murder.

Leon is also the first to be given the Voight-Kampff test, which helps human authorities tell if someone is a replicant. It is during this test that Leon becomes deadly.

With a lifespan of four years, Leon is only two at the start of the film. He meets his demise at the hands of another replicant while he is attempting to kill Deckard.

The late Brion James played Leon.

The upcoming sequel, Blade Runner 2049, starring Ford and Ryan Gosling, is due out Oct. 6.