Mary Poppins Presented by Hemlock High School Theatre Thursday March 13th, Friday March 14th, and Saturday March 15th 7:00pm at Hemlock High School's Gariglio Auditorium. Reserve seating tickets go on sale to the public starting Sunday February 23rd and are $10 each and will be sold online at www.hemlocktheatre.ludus.com until sold out. Doors open to the theatre a half hour before the show.