Visible crew/equipment: When the Batmobile is driving itself to Batman and Vicky Vale, you can clearly see a hand turning the steering wheel. (01:12:00)

Batman (1989)
Plot summary
Directed by: Tim Burton
Starring: Michael Keaton, Jack Nicholson, Kim Basinger, Jack Palance, Michael Gough, Billy Dee Williams, Robert Wuhl
Bruce Wayne is the masked hero Batman. A criminal raids a chemical plant. His employer tipped the police. Batman arrived and knocked him into a vat of chemicals. The criminal became the Joker. He poisons make-up, hairspray, and deodorant to make a combination of them cause the user to die of laughter. He goes to release laughing gas at a parade through floats but Batman arrives and stops him. Joker kidnaps Vicky Vale and takes her into a tall building.
The Joker: And now, folks, it's time for "Who do you trust!" Hubba, hubba, hubba! Money, money, money! Who do you trust? Me? I'm giving away free money. And where is the Batman? HE'S AT HOME WASHING HIS TIGHTS!
Question: How did Grissom figure out Jack was sleeping with Alicia?
Answer: Eckhardt ratted Jack out after getting assaulted by him and muttering under his breath: "Where've you been spending your nights?" He watched Jack long enough to get dirt on him and told Grissom that Jack was stealing his woman. Grissom confirmed it by inviting her up to his apartment when Jack happened to be there and watching to see if they recognized each other. Then he immediately set Jack up to take the fall for Axis Chemicals and gave Eckhardt the tip to get there first and assassinate him.





Answer: He was suspicious, but when she first entered the penthouse and Grissom said to leave their business meeting, he noticed the sexy facial exchange Alicia and Jack gave each other.