Other mistake: As Virgil prepares to clear the wreckage of the tower from the rescue area using the Firefly, Scott tells him that he will go over to Thunderbird 2 to prepare the Mole for tunneling. The Tower Controller then says to Scott, "I've got a fast car ready for you outside" without moving his lips.
The See-Paris-and-Die Affair - S1-E22
Other mistake: Solo seems to forget just who called whom when he calls Illya on the communicator. After Illya picks up, Solo answers as though Illya had called him instead. (00:32:40)
Other mistake: It is established that Drs. Quest and Hartman speak the Po-Ho's language, but when they are captured, Dr. Hartman is translating to Dr. Quest how the Po-Hos are going to torture them.