Related:

• Holly: Purple alert! Purple alert! Lister: What's a purple alert?
  Holly: Well, it's like not as bad as a red a alert, but a bit worse than a blue alert -- sort of a mauve alert....
• Red Alert. -- Q, "Deja Q", stardate 43539.1
• RED ALERT! Tagline Being Stolen! Shields Up! Arm Phasers!
• CONFUSION ALERT! CONFUSION ALERT!
• In Memphis, Tennessee, it is illegal for a woman to drive a car unless there is a man either running or walking in front of it waving a red flag to warn approaching motorists and pedestrians.
• Kirk: "Mister Spock and I are going down to the planet's surface.
  You will be in command. Your responsibility is to the *Enterprise*, not to us, is that clear?...
• Holly: Rude alert! Rude alert! An electrical fire has knocked out my voice-recognition unicycle!
  Many Wurlitzers are missing from my database!...