Cheap$kate: Oct. 25-31

Show off your skating moves at The Pond at Bryant Park.

Movies

Roman Polanski may be banned from the U.S., but lucky for us, his movies aren’t. Take in excerpts from some of his classics (including “Rosemary’s Baby” and “The Pianist” ) as a panel of film experts discusses his cinematic impact. Audience Q&A to follow. (Today, 6:30 p.m., FREE, Queens College’ s Kiely Hall, enter at Reeves Ave. and 150th St., Queens, www.qc.cuny.edu, 718-997-5000)

Skating

As much as you might not want it, cold weather is here, so just embrace it. Grab your skates and head to the grand opening of The Pond at Bryant Park. Enjoy a FREE go around the rink if you BYO skates (rentals are $12). (Friday, 6 a.m. - 7 p.m., FREE to skate, Bryant Park, 42nd St. and Sixth Ave., thepondatbryantpark.com)

Art

Embrace the city’s greens while saving the ones in your wallet. Arboreal is an exhibit of paintings, photographs, drawing and sculptures inspired by our city’s trees. (Closes Thursday, 9 a.m.-5 p.m., FREE, Arsenal Building in Central Park, Third Fl., 64th St. and Fifth Ave., nycgovparks.org, 212-639-9675)

Halloween

Are you a Heather? Or maybe you’re more of a Veronica. Either way, step back into the '80s and take your bad self to Brooklyn for A Very Heathers Halloween. (Saturday, midnight, FREE, Union Hall, 702 Union St. at Fifth Ave., Park Slope, unionhallny.com, 718-638-4400)

Book signing

From the slums of London to the hills of L.A., “The Elephant to Hollywood” is Michael Caine’s firsthand tale of his evolution from Maurice Micklewhite of London’s Elephant and Castle neighborhood to two-time Academy Award winner Sir Michael Caine. Chat up the famed actor at his book signing tomorrow. (Tomorrow, 6 p.m., FREE, Barnes & Noble Fifth Ave., 555 Fifth Ave., barnesandnoble.com, 212-697-3048)

Book signing

Take a gander at Kat von D’s ink while she inks your copy of “Tattoo Chronicles.” The tattooed vixen will be signing copies of her book tomorrow afternoon. (Tomorrow, 12:30 p.m., FREE, Barnes & Noble Fifth Ave., 555 Fifth Ave., barnesandnoble.com, 212-697-3048)

Comedy

Pasty vampires and buff werewolves your thing? No? Well then this might be. Comedy group the Raspberry Brothers narrates the “The Twilight Saga: New Moon,” meaning it might actually be good this time around. (Tomorrow, 8 p.m., FREE, 21+, Knitting Factory, 361 Metropolitan Ave., Brooklyn, bk.knittingfactory.com, 347-529-6696)