Overview 
      
        
          | Production number | 
          39 | 
         
        
          | Air date | 
          Oct 6th, 1967 | 
         
        
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          | Director | 
          Marc Daniels | 
         
        
          | Teleplay | 
          Jerome Bixby | 
         
       
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      - Story
 
      
        
          | A landing party accidentally arrives at a parallel universe where the Federation is a
          barbaric and violent empire. | 
         
       
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      - Guest Cast
 
      
        
          | Barbara Luna | 
          Lt. Marlena Monroe | 
         
        
          | John Winston | 
          Lt. Kyle | 
         
        
          | Vic Perrin | 
          Tharn | 
         
       
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      - Rating
 
      
        
     
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