Why was original Star Trek Cancelled?

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Tags

1. #status
2. #broadcast
3. #after
4. #became
5. #years
6. #culture
7. #achieving
8. #series
9. #canceled
10. #classic
11. #1970s
12. #episodes
13. #later
14. #influence
15. #nielsen
16. #while
17. #ratings
18. #throughout
19. #three
20. #seasons
21. #several
22. #popular
23. #remaining
24. #developing
25. #syndication
26. #network