Manly, Dee Why, Long Reef, Queenscliff, Freshwater, North and South Curl Curl, North Steyne and North Narrabeen beaches were closed on Tuesday in the northern Sydney area
"All week, I was just pinching myself that we were getting to work together," Rauch tells PEOPLE while Bialik, who plays a heightened version of herself, teases that the Jan. 14 episode includes an "elaborate twist"