Commander Koenig leads a survey team to a seemingly lush, Earth-like planet to replenish the Moonbase's rapidly depleting supplies. However, their arrival triggers a catastrophic atmospheric chain reaction:
Two crew members die after drinking water previously declared safe, and an unknown alien presence kills anyone who attempts to look directly at it. Spazio_1999_02x23
Tony Verdeschi falls into a coma during the mission, and Koenig must find a way to communicate peacefully with the alien to save his crew and escape the deteriorating planet. Cast & Key Characters Commander John Koenig: Played by Martin Landau . Dr. Helena Russell: Played by Barbara Bain. Maya: Played by Catherine Schell. Tony Verdeschi: Played by Tony Anholt. Alan Carter: Played by Nick Tate. Production Notes Commander Koenig leads a survey team to a
The planet's once-safe vegetation becomes toxic, and the Alphans' metal equipment begins to corrode rapidly. Cast & Key Characters Commander John Koenig: Played
The episode is notable for featuring the Glider , one of the most unique vehicle models in the series.