Along with LIS, I devoured TTT as a kid. It came on every Friday night. I can see why it was so expensive to produce with the massive sets (as evident in the pilot), the intricate detail regarding them (whether full-size, model or matte), and the special effects.
Of course, there were the basic Irwin Allen inconsistencies. Regarding Tony and his Adam-line sweater, the two heroes always had the same clothes, jumping from one point in time to another and their livery never got ripped, torn or even dirty. Also, when they had to dress in the "fashion" of whatever time they were in, somehow when the time tunnel sucked them away, that clothing disappeared and they were back in their original duds, flying through the multi-colored opening between times.
Gerard