To Darrell Hammond, Monday’s Mission Gratitude show at Symphony Hall is personal. The evening will benefit the Home Base program, which helps veterans of war in Iraq and Afghanistan and their families deal with “invisible wounds,” the more subtle mental scars of combat caused by post-traumatic stress disorder and traumatic brain injuries. Hammond witnessed firsthand the mental stress his father endured as a veteran of World War II and the Korean War, and as a child, it made Hammond afraid to be around him.
The “Saturday Night Live” alum coheadlines the night with fellow comedian Sarah Silverman and country music acts Big & Rich and the Band Perry. The lineup also includes music by Rita Wilson, Cassadee Pope, the Henningsens, and Angie Johnson, and appearances by former Red Sox Tim Wakefield and Pedro Martinez and historian Doris Kearns Goodwin.