The Master smiles, just a little, at John's rampant denial. "Are you asking me if I want to go 'home', or if there's anyone I miss? Because those are, in fact, two very different questions."

He doesn't miss Lucy, anyhow. How could he? But he does miss having a family, and that power over twelve billion Earthlings, Toclafane included. Oh, how he misses that.

Gallifrey, on the other hand... the Master grits his teeth and concentrates on keeping John at least fairly upright. Gallifrey is entirely off-limits.