With his 27-year-old son Sasha alternating as cinematographer, photographer Joel Meyerowitz took his 87-year-old father Hy on a road trip from his Florida retirement home to the family’s old neighborhoods in New York. Hy has Alzheimer’s disease, so he has difficulty joining in Joel’s reminiscences on such subjects as the “Jewish” parakeet the family used to have; indeed, he barely remembers Joel’s two brothers. Still, Hy enjoys visiting an alligator farm, makes friends easily at Walt Disney World, and functions as an un-self-conscious advocate for cross-cultural fellowship wherever he goes. The director intercuts footage of the trip with some of the family’s home movies, crafting an offhand cinematic commentary on the honor-your-ancestors quotation from the Talmud that introduces the film. The result is not the liveliest road movie ever made, but it is warm and sometimes poignant. The director will discuss Pop at both screenings. At 8 p.m. Thursday & Friday, March 4 & 5, at the Hirshhorn Museum and Sculpture Garden’s Ring Auditorium, 7th St & Independence Ave.. SW. Free. (202) 357-2700. (Mark Jenkins)