At a very early stage in prepping this season, the producers planned for a trio of three-part adventures: one with Egghead and Olga, one with Lord Ffogg in Londinium, and one with Eartha Kitt as Catwoman. Then they and the network got cold feet, fearing that the audience wouldn’t stick with the stories that long. They couldn’t do anything about the Londinium story, short of shelving the fool thing, but they decided to split the others into a two-parter and a one-off.
In this case, it almost works, as each half-hour has its own little plot, and some quick reshoots in the set of Commissioner Gordon’s office try to paper over the cracks and make this feel like the villains, captured after episode 3.9, are back in town. But this episode is clearly the first of the three: it introduces us to the idea that Egghead intends to marry Olga after stealing enough of a dowry. Part of this is a heavy, solid gold egg which is clearly seen in their lair in episode 3.8. So they almost got away with it if it weren’t for these meddling props.
This does mean that the original ending for the episode must have been lost. Remember that this season is light on the cliffhangers, but there must have been some level of wrap-up, a “what do we do next” scene. Instead, we get the remarkable coda in which it’s just casually revealed that Egghead and Olga were arrested offscreen, before the teaser announcing another chunk of the Catwoman story. I certainly don’t think we’ve seen them do that before and I hope we don’t see it again!
Anyway, Vincent Price, Anne Baxter, and Yvonne Craig all look like they had fun making this episode. It felt kind of odd having Batman and Robin being so superfluous to the story. Really, all they do this time is rescue Batgirl from drowning in caviar, otherwise this story belongs to Batgirl and not them.