The SouthCoast Children’s Theatre will perform “Arsenic and Old Lace,” directed by Kyle Lamontagne and Olivia Levasseur, on Friday, Nov. 16 at 7 p.m. and Saturday, Nov. 17 at 1 p.m. Performances will be held at St. Mary’s Parish Hall, 783 Dartmouth St. Tickets cost $15 for adults and $12 for children and seniors over age 65.