Books and Brews: Held in conjunction with the Times Festival of Reading, bring your books collecting to dust to exchange for different books. Take one book for every book you bring. 5 p.m., 3 Daughters Brewing, 222 22nd St. S, St. Petersburg. Free. (727) 495-6002.
Come Back to the Future Party: The day Marty McFly went to in Back to the Future Part II is finally here. Celebrate Oct. 21, 2015 with a costume contest and music by Come Back Alice, the Future Vintage Band, Row Jomah and special guests including Dennis Stadelman, Chris Sgammato and Christian Ryan. 8 p.m., Crowbar, 1812 N 17th St., Tampa. $10. (813) 241-8600.
Boom, Bust, and the Built Environment Lecture Series: The Quest for a Livable City: Programs throughout 2015 discuss aspects of St. Petersburg's boom-bust cycle. This discussion will examine economic development, gentrification, local food and more. 6:30 p.m., Green Bench Brewing Co., 1133 First Ave. N, St. Petersburg. Free. (727) 824-7802.
Halloween Horror Nights: On select nights through Nov. 1, Universal Studios is transformed into a nightmarish labyrinth of nine haunted houses. Open until 1 a.m. 6:30 p.m., Universal Orlando, 6000 Universal Blvd., Orlando. $101.99 general, $49.99-$76.99 Florida resident. Toll-free 1-888-467-7677.
Maze of Horror: An office worker unknowingly brings an infectious disease to his office and it quickly spreads. Enter the Zombie Quarantine Experience and see who comes out alive. Benefits music programs for underprivileged children. 7 p.m., Maze of Horror, 2350 34th St. N, St. Petersburg. $10. (727) 278-1547.
A Gentleman's Guide to Love and Murder: The 2012 Tony Award winner for Best Musical tells the hilarious story of Monty Navarro, a distant heir to a family fortune who sets out to slay his way through the line of succession, and be done in time for tea. Through Sun. 7:30 p.m., Carol Morsani Hall at the Straz Center for the Performing Arts, 1010 N MacInnes Place, Tampa. $40-$95. (813) 229-7827.
KIDS AND FAMILY
Pumpkin Patch for Dogs: Bring your children and your pets for photos among thousands of pumpkins and gourds and festive Halloween decorations. Pick out a plump pumpkin or a painted jack-o-lantern to take home. Pumpkin sales benefit homeless pets. 12 p.m., Humane Society of Tampa Bay, 3607 N Armenia Ave., Tampa. Cost of pumpkins only. (813) 876-4150.
SERIES PREMIERE Hellevator, 8 p.m., GSN. Be afraid. Be very afraid. From the twisted minds that brought you Paranormal Activity comes Hellevator. It's a game show that challenges contestants to ride a haunted elevator and complete terrifying tasks before time runs out on them.
MORE TO EXPLORE
Find more events for Halloween at tampabay.com/things-to-do.