Get Tangled Up in a Murder Mystery Agatha Christie delivers tension and laughter in equal parts in Spider’s Web, through July 11. The comedy thriller boasts an intricate plot of murder, police, drug addicts, invisible ink, hidden doorways and secret drawers. Friday, 7:30 p.m., Saturday, 3 p.m. and 7:30 p.m.; and Sunday, 3 p.m. Call for ticket prices. Desert Stages Theatre, 7014 E. Camelback Rd., Scottsdale, 480-483-1664, desertstages.org. Start Your Day with a Good Sweat...