Number Five: Technically, if you’re near your doppel for long, you’ll go insane. So, if you see your other self…

Diego Hargreeves: Kill them.

Klaus Hargreeves: Sleep with them.

Number Five: Avoid them.

Luther Hargreeves: What the hell is wrong with you?

Klaus Hargreeves: Oh, come on. As if you wouldn’t climb Luther Mountain.

From the TV series The Umbrella Academy – Season 3 Episode 1: ‘Meet the Family’ (3×01) | Produced by Netflix