- Isambard Sinclair, narrator: Across the great city, smiling in the sun, Dangermouse tracks the fateful arrows, wherever they lead. And, at last, they lead him to the deepest, darkest, dampest, dingiest dreadful drain.
- Danger Mouse: Good grief! What a deep, dark, damp, dingy, dreadful drain this is.
- Isambard Sinclair, narrator: On tramps our hero, on into the deepenest, darkenest, dampenest, dingiest of the dreadful drainiest. Until at last he sees:
- Danger Mouse: Penfold!
- Penfold: [inside Greenback's intergalactic traveling machine] We're in trouble, aren't we, Dangermouse?
- Danger Mouse: Yes, Penfold. Say goodbye, Penfold.
- Penfold: Goodbye, Penfold.
- Danger Mouse: Good grief!