In addition the footage of Gordon, O'Hara (who was named after producer Charles's Fitzsimons actor brother James O'Hara who portrayed serveral cops throughout the series) and Barbara was rewritten and reshot around the Egghead and Olga footage to form this into a single part story. The bits about Egghead getting out on a techinicality and the Cossacks not being wanted by their own country was an attempt to cover the reason they came back so soon after the previous episodes.
Anne Baxter “Working with Vincent was a delight, and Vincent had a lot of fun with Egghead. He hated the makeup, though; it took forever, and it was very hot.”
“I had a Russian friend, and I was supposed to swear at my platoon of Cossacks, so I said, ‘How do I say, “Stand still” and military things?’ I wrote them down phonetically, and when I rattled them off, they came to me and said, ‘They sound like swear words.’ I said, ‘Wait a minute; I’m doing Russian,’ but it sounded like ‘S.O.B.’ However, she [Olga] does spout Russian.”
The best part about this segment is that Vincent gets a lot more screen time and a few bits of comic business. Such as when he has to carry away the Egg of Ogg, and finds it is heavier than it looks (he did the same bit with the box of radium in the Dinosaur episode) and when he does his cowardly act with Batgirl, where he admits he is smart and clever but a complete coward. Not the best routine for Egghead, but Vincent had a ball with it.
Next the team-up of the Joker plays second fiddle to the new Catwoman.