- The Mysterons: This is the voice of the Mysterons. We know that you can hear us Earthmen. WE have observed the Spectrum organisation's attemps to counter us, but one of the members of Spectrum will betray you all. We will be avenged.
- Colgan: Who are you and... what are you doing here?
- Captain Blue: I'm Captain Blue, Spectrum!
- Colgan: I'm afraid you'll have to prove it.
- Captain Blue: Prove it...?
- Colgan: Yes, as a member of Spectrum, you know the cipher codes for example.
- Captain Blue: Right. But I'm not telling you.
- Colgan: Or can't, because you don't know them.
- Captain Blue: This has gone far enough!
- Colgan: If you are Captain Blue, it shouldn't be so difficult to prove it.
- Colgan: Don't try anything Captain. The hypodermic contains XK-4, the ultimate truth drugs. Make it easy on yourself, tell me the Spectrum cipher code.
- Captain Blue: Go take a walk.