Ghost trackers Michelle Desrochers and Patrick Cross talk about haunted occurances at Casa Loma. Through Thursday, 7 p.m. $25, child $15. 416-923-1171,

The 4x4 festival, a celebration of Canadian women directors takes place at venues around the city through Nov. 22,

The International Festival Of Authors, featuring readings, interviews and discussions with Canadian and international authors, continues at the Harbourfont, 235 Queens Quay W.,

David Gray performs at Massey Hall, 178 Victoria St., with Lisa Hannigan. 8 p.m., $54.50-$64.50,

The Glenn Gould Prize Gala takes place at the Four Seasons Centre for the Performing Arts at 8 p.m.,

Second City presents Panic! Everybody’s Doing It, a show about finding perspective in times of world crisis. 51 Mercer St.,