I always considered Star Trek a cheap rip off of Lost in Space, not that EITHER of them if you watch today had great sets or special effects.
I watched That Girl, and Dark Shadows.
But looking at the list of top TV shows of 1966, NONE of them were in the top 10. Other than The Virginian and Lawrence Welk, I watched all these shows.
Top TV Shows 1966:
1. Bonanza NBC
2. The Red Skelton Hour CBS
3. The Andy Griffith Show CBS
4. The Lucy Show CBS
5. The Jackie Gleason Show CBS
6. Green Acres CBS
7. Daktari* CBS
7. Bewitched* ABC
7. The Beverly Hillbillies* CBS
10. Gomer Pyle, U.S.M.C.* CBS
10. The Virginian* NBC
10. The Lawrence Welk Show* ABC
10. The Ed Sullivan Show* CBS