Loved TZ. Calling this show "iconic" doesn't even begin to do it justice.
Outer Limits, when it was good, it was very, very good.
The Invaders. Loved this one too. Real "cold war era" feel to it. Loved how Vincent always seemed on the verge of cracking up. I don't think he even cracked a joke until the second season, when he had help.
The Immortal. Really liked the pilot film. Haven't seen any of the eps in ages, but as I recall the writing was sub-par due to a labor dispute.
Time Tunnel and Voyage, started off good but turned into "monster of the week" shows.
"Night Stalker"-Loved both pilot movies, but the series was too campy by half.