Seventeenth episode of the Original Series.


Living energy crystals will kill Commander Taggart unless Dr. Lazarus can decode the shocking secret hidden in their light spectrum. But there's a catch, Lazarus is suffering from the Tev'Meck flu, which has made him color blind!


  • When Sarris' troops attempted to launch the cast of Galaxy Quest, Jason Nesmith dropped a hint to Alexander Dane by referencing the episode. The two began a false squabble to distract the guards so they could disarm them.