Celebrate your favorite books, movies, comics, and all things geeky at the afternoon-long Plaza PopCon.

Come dressed as your favorite fictional character, and enter the costume contest. Test your wits in the escape room. Plus: 

• Kick things off with a radio theatre production of the high-flying sci-fi spoof Rex Dexter of Mars by the comedy theater troupe Right Between the Ears. 
• The local 501st Legion, a group of Star Wars enthusiasts in intricately detailed Dark Side / Storm Trooper costumes, makes an appearance.
• The Heart of America Shakespeare Festival stages a light saber duel.
• Tech coaches offer guidance on reading comics on your handheld devices.
• Enjoy virtual reality experiences and video and board gaming.
• Kids can enjoy a superhero training camp.

Noon to 5 p.m.