Leo Johnson is a fictional character on the 1990-1991 primetime ABC series Twin Peaks, portrayed by Eric Da Re.

Leo in one of his more humorous scenes
Leo is one of the major suspects in the murder of Laura Palmer, with whom he had sex at least once. He is a drug runner, and is also linked with Jacques Renault, whom he smuggles over the border. According to the town sheriff, Johnson is free only because the department hasn’t found sufficient evidence.
Johnson beats up his wife Shelly regularly, often just because he can but also because of his (accurate) suspicions of her infidelity. He also reads Fleshworld magazine and advertises for sexual link-ups through it.
Leo traps Shelly in the Packard Saw Mill and sets it in on fire as revenge for her affair with Bobby Briggs, but Shelly is freed by Catherine Packard Martell and survives. To cover for the fire, Ben Horne hires Hank Jennings to shoot Johnson. By coincidence, Johnson is attacking Bobby at the time (with an axe), so Bobby witnesses Hank shooting Johnson.
Leo subsequently lapses into a coma, and is confined a wheelchair. He appears to be brain damaged, but eventually returns to consciousness by unknown means and attacks Shelly.
Towards the end of the second season, he becomes Windom Earle’s slave, and is controlled by an electrified collar. He releases Major Garland Briggs from captivity, apparently finding some degree of redemption in his desire to save Shelly from Earle. Earle responds by confining Johnson in a contraption which will release deadly spiders on his body as soon as he unclenches his jaw.
Leo briefly appears in the series finale as he is still clenching the contraption with his jaw. Because of the series' cancellation, his ultimate fate is unknown.