Check out these films screening on Saturday at the Boulder International Film Festival.

‘The Summer Book’

• 10 a.m. Saturday, Boulder Theater, 2032 14th St., Boulder

• U.S./Finland feature film, 95 minutes, 2024

• Colorado premiere

“The Summer Book,” based on Tove Jansson’s 1972 novel of the same title, is a story of the relationship between Sophia, an 8-year-old girl who is growing up fast, and her artist grandmother, who is nearing the end of her life. They spend time together with Sophia’s father at the idyllic family summer house on a tiny unspoiled island in the Gulf of Finland.

All three are coming to terms with the recent death of Sophia’s mother in very different ways. Starring Glenn Close, Emily Matthews and Anders Danielsen Lie, “The Summer Book” brings Jansson’s most beloved characters to life and celebrates a family’s all-encompassing love. Directed by Charlie McDowell; produced by Charlie McDowell, Aleksi Bardy, Kevin Loader, Kath Mattoch, Duncan Montgomery, Alex Orlovsky and Helen Vinogradov.

‘In Waves and War’

• 12:15 p.m. Saturday, First United Methodist Church,1421 Spruce St., Boulder

• U.S. feature documentary, 108 minutes, 2024

• Boulder premiere

• Filmmakers Bonni Cohen, Jon Shenk and Jessica Anthony will appear in person

Highly decorated Navy SEAL Marcus Capone returns from Afghanistan and attempts to readjust to civilian life, but years of unprecedented warfare have left him with unrelenting psychological pain. Fearing for Marcus’ life, his wife Amber finds hope in a groundbreaking therapy combining two powerful psychedelics unapproved for use in the U.S., but with seemingly limitless applications.

Inspired by his remarkable recovery, but confronted with the alarming rate of veteran suicides, Marcus and Amber embark on a new mission: providing access to this lifeline. “In Waves and War” is the incredible odyssey of three American heroes as they try to overcome the after-effects of war and rediscover their humanity. Directed by Jon Shenk and Bonni Cohen, produced by Jon Shenk, Bonni Cohen and Jessica Anthony.“Apollo 1”

• 2:45 p.m. Saturday, Boulder Theater

• Germany/U.K. feature documentary, 101 minutes, 2025

• Filmmakers Mark Craig, Keith Haviland and Ansgar Pohle, with editor Jörg Levsen, and film subjects Barbara Cernan Butler and Martha Chaffee and Sheryl Chaffee will appear in person.

• World premiere

Martha Chaffee met her husband Roger on a blind date. An accomplished pilot and a devoted spouse and father, he flew surveillance sorties during the Cuban Missile Crisis before joining NASA’s Astronaut Corps. Ed White was another extraordinary man who became the first American to walk in space. Gus Grissom was made of the original right stuff. He served in WWII and flew space missions in the Mercury and Gemini programs. They all met their fate on January 27, 1967, on Pad 34 at Cape Kennedy. What happened that day would shock the nation and NASA to its core, shatter the lives of the families of the three astronauts, and change space travel forever. “Apollo 1” tells the inspiring story of the human spirit, as we look to a new generation of Artemis astronauts who are prepared to face the ever-present risks of space exploration. Directed and produced by Mark Craig; also produced by Keith Haviland and Ansgar Pohle.

‘The Flight of Bryan’

• 5:15 p.m. Saturday, Grace Commons, 1820 15th St., Boulder,

• U.K. feature documentary, 96 minutes, 2024

• U.S. premiere

• James Erskine will appear in person.

“The Flight of Bryan” is the story of Bryan Allen, an unemployed amateur cyclist, Paul Maccready, a heavily-in-debt father of three, and a ragtag team of neuro-diverse outliers. They set out on a death-defying, madcap quest to solve the mystery of human powered flight and, in doing so, win the most coveted prize in aviation. Built from a remarkable trove of recently discovered 16mm film footage from the ’70s, along with an arsenal of innovative techniques, this uplifting and humorous story of ingenuity and courage challenges the assumptions we make about society’s outliers. It reminds us of how the stories we tell can help us to understand, and to perhaps change, the world. Directed by James Erskine, produced by Alex Holmes, Victoria Gregory, Sean Sorensen, Philipp Manderla and Adele Reeves.