Reginald Hargreeves: As my Number One, I need you to deal with the threat.

Luther Hargreeves: I’m ready. But, uh…

Reginald Hargreeves: Yes?

Luther Hargreeves: You don’t need to call me by my number anymore.

Reginald Hargreeves: Why not?

Luther Hargreeves: Because I’m the only one left.

From The Umbrella Academy – Season 1 Episode 4: ‘Man on the Moon’ (1×04)