The town’s Health Division and Human Services Department are partnering with a mental health organization, BasicNeeds US, to screen a documentary about global mental health issues at 7 p.m. Oct. 22 at Clarke Middle School, 17 Stedman Road. The documentary, “Hidden Pictures,” tells the stories of people struggling with mental illness in India, China, France, the United States and Africa. The free screening will be followed by a panel discussion with filmmaker Delaney Ruston, Human Services staff member Emily Lavine , Lisa Lambert of the Parent/Professional Advocacy League, and BasicNeeds president Richard Dougherty. BasicNeeds, a global nonprofit with an office in Lexington, coordinates mental health initiatives in the developing world. The town agencies decided to screen the film after a survey conducted through the Lexington Healthy Communities Project found that residents want more affordable and accessible mental health care, especially for young people and seniors. The screening is intended to promote discussion about the stigma surrounding mental illness and to raise awareness about mental health issues locally and around the world, the town’s Health Division director, Gerard Cody, stated in an e-mail.