Romeo and Juliet: St. Petersburg Opera performs the French version of Shakespeare's classic, noted for its duets and for Juliet's first act waltz. Read our review at tampabay.com/things-to-do. See it at 7:30 p.m. at the Palladium Theater, 253 Fifth Ave. N, St. Petersburg. $21-$65. (727) 822-3590.
Dog-A-Ween: Bring your dogs dressed in costume to this weekly Halloween contest. The winners will compete in the finals for the grand prize of a Corona Beach Cruiser on Oct. 29. Includes a Yappy Hour with Canine Cafe menu and drink specials. It starts at 6 p.m. at the Kitchen, 226 First Ave. N, St. Petersburg. Free. (727) 565-0540.
Tampa International Gay and Lesbian Film Festival: This year's festival explores love and partnerships in gay and lesbian lifestyles. Tonight's screenings include Pit Stop and The Battle of amfAR. Movies start at 6:30 p.m. at the Tampa Theatre, 711 Franklin St., Tampa. $9. (813) 274-8982.
Enric Sala: One of National Geographic's newest Explorers-in-Residence, Dr. Enric Sala will discuss the adverse impacts of pollution, overfishing, climate change and industrialization on marine ecosystems and finding ways to restore health to the oceans. Talk starts at 7 p.m. in Ferguson Hall at the Straz Center in Tampa. $25. (813) 229-7827.
The Susan G. Komen 3-Day 60-mile walk for breast cancer will be Oct. 25-27, but the 2014 event has been canceled. An item in last Thursday's Weekend section was not clear.
SEASON PREMIERE Supernatural, 9 p.m., CW Sam collapses and is going to die, but Dean calls angels to help him recover. That's what House members will suggest as a replacement to Obamacare.
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Find this week's new #CookClub recipe at tampabay.com/things-to-do.
Graphicstudio Benefit Sale: The atelier at the University of South Florida discounts coveted works from its archives 10 to 60 percent. Some are the last "extras" and won't be seen again for sale at the studio. Runs 10 a.m. to 6 p.m. Friday at Graphicstudio at USF in Tampa. (813) 974-3503.
Florida Orchestra: Kicks off the season in a big way, joining with the Master Chorale for Beethoven's Symphony No. 9 and its Ode to Joy. Concerts Friday at the Straz Center in Tampa, Saturday at the Mahaffey in St. Petersburg and Sunday at Ruth Eckerd Hall in Clearwater. $15–$45. (727) 892-3337.
Kellie Pickler: The country singer with the dizty reputation on American Idol has grown into a confident artist. See her Friday at Ruth Eckerd Hall in Clearwater. $29–$55. (727) 791-7400.
Streetcar Fest: To celebrate Tampa's historic streetcar line, take a ride for just 25 cents Saturday. Includes live music by Distinguished Men of Brass and Green Sunshine. A good place to catch it is at Centro Ybor.