So I rewatched both "The Tholian Web" and "Whom Gods Destroy" last night, to see if they point one way or another for when Garth's incarceration might have taken place. And despite my really liking the idea of Pike being promoted to Fleet Captain as a publicity move to replace the insane Captain Garth, I'm now thinking it was fairly likely that Garth's insanity happened fairly recently, sometime between TTW and WGD.
My thoughts on the episodes in general (they were my first viewings in a while, and I thought that
@Phaser Two might enjoy that I watched two S3 episodes):
"The Tholian Web" is a pretty good episode, especially for the third season, but I feel like it was trying to do a few too many things at once. We have the crew trying to solve the mystery of the
Defiant, mourning the presumed-dead Captain Kirk, dealing with the spread of madness throughout the ship, and encountering the Tholians and their web trap. I think if they concentrated on just half of those elements, the episode would've been more effective as a whole. The titular web barely figures into the story, except as a device to keep the
Enterprise stuck in one place. And there are a few moments that just play as campier than intended, like when the crewman freaks out in the middle of Kirk's memorial service. I also wondered why in the world Uhura was putting
on a necklace when she was apparently getting ready for bed. So overall decent, but not one I'll be rewatching again very soon.
"Whom Gods Destroy" is okay at best. It's a bit too reminiscent of "Dagger of the Mind," with the inmates taking over the asylum idea, and often plays as a campier version of that episode. The performances of Ihnat and Shatner are rather over the top at times. The moment where Marta is blown up also plays as more silly than horrifying. It's also rather slow, with several repetitive scenes of Garth trying to beam up to the
Enterprise but being stymied by the 3D chess passcode and Marta trying to seduce Kirk. I feel like this was probably a reflection of the slashed third season budget, as the writers couldn't really take their story anywhere besides the few standing sets they were allowed. There's also a LOT of recycled costumes and makeups, with Garth wearing hand-me-downs from Commissioner Ferris from "The Galileo Seven" and Kodos from "The Conscience of the King" and his fellow inmates dressed as the ambassadors from "Journey to Babel." Yvonne Craig looks great, but she's not as memorable an Orion Slave Girl as Susan Oliver in "The Cage." I find this one most intriguing for the hints it gives of early Federation/Starfleet history (Garth as Starfleet's greatest Captain, his victory at Axanar, the Axanar Peace Mission that Kirk participated in as a "new-fledged cadet," etc.).