On the cusp of Halloween, “Horrors! Sorcerers, Witches and Madness from Handel’s and Purcell’s Operas” is the exciting and first-ever collaboration between the Indianapolis Baroque Orchestra and Indianapolis Opera. The program features eerie, otherworldly, and downright spooky scenes from Baroque-era operas by George Frideric Handel and Henry Purcell. The concert is led by longtime IBO concertmaster Allison Nyquist. For this project, the singers of Indianapolis Opera’s Resident Artist Program are coached by countertenor Drew Minter.