"Smack In The Middle"
Batman rescues Robin from the Riddler's hideout, and they rush to prevent an international incident when he tries to steal a Moldavian woolly mammoth.
When Batman mistakenly brings Riddler's disguised assistant into the Batcave, she tries to escape up onto the catwalk. He makes a half-hearted attempt to save her, but she falls into the Batmobile's Nuclear Power Source. He later recalls this turn of events as "two ships passing in the night."
Read how Robin escaped from Riddler's vise-like instrument!