Steve Ihnat was a good actor and I think he did a credible job as Lord Garth, but I just wasn't fearful of his characterization. Morgan Woodward was excellent as Dr. Van Gelder in S1 and Captain Tracy in S2. However, he was noticeably absent in S3. I can visualize him as a more sinister Lord Garth just because of hs physical presence and his resounding voice. What say you?
Every show has the recurring actor who plays multiple characters. I believe the trope is officially called "The Jeffrey Tambor Syndrome" due to his playing a record number of characters on "Three's Company", though back then the lack of home video made it easier...
No. Ihnat was fine -- the script and direction were a mess.
It's superficially entertaining, but is definitely no patch on "Dagger of the Mind". Season 3 recycling plots to save money but at least the split screen effect for both Kirks looked good.
The shapeshifting ability shouldn't even begin to include clothing, which - along with how the magical medicine can end all mental illness for all time - yup, the script is a huge mess. But the superficial value and actors keep it moving briskly along. (and kudos to Shatner with doing the as-Garth tantrum, which works rather well...)
I will admit that Garth and Marta being clinically insane and getting dialogue that actually shows a side of it that makes the viewer uncomfortable is not often seen in the media. That I could... appreciate, even if it meant the episode didn't get many ratings or accolades as a result.
And Garth in gold and teal boots? The episode is a mess in a number of ways, but those little touches regarding Garth's costume are... impeccable. At least he didn't belt out the chorus to "These Boots Are Made for Walkin'"...
The direction is definitely a mess; among other issues, Marta inconsistently has a green light spotlight aimed on her to glow. The other half the time she doesn't. And it wasn't due to her poetry - of which, how come she's digging back to 1609 to dredge up material when there is plenty of good love poems written some 380 years later. Like "Whip It". Oh very well, the show was made in 1968 but having her belt out "Can't Get No (Satisfaction)" would just look silly...