Welcome to The DocArena Podcast in association with Film Ireland. My name is Ross Whitaker and every fortnight, I want to dig deeply into the motivations of documentary filmmakers – how do they choose their subject material and what approaches and strategies do they employ to fund, craft and distribute their work…
In episode 25 of the DocArena Podcast, Ross Whitaker catches up with directors Peter Mortimer (The Alpinist, The Dawn Wall) and Nick Rosen (The Alpinist, Reel Rock) to talk about their biggest project to date, The Dark Wizard, which is available to stream now on HBO Max.
This HBO Original four-part documentary series, The Dark Wizard, gives an up-close and unflinching portrait of Dean Potter, one of the world’s most influential and controversial climbers, BASE jumpers, and highline walkers.
This podcast has been made possible with the support of the Fís Éireann/Screen Ireland Stakeholders Fund.
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The Dark Wizard traces the jaw-dropping feats that made him a legend, as well as the personal turmoil that defined his life.
From an early age, Dean grappled with inner demons that led him to seek the limits of human possibility. Climbing became his outlet and Yosemite National Park became the canvas for his unique talent and artistic expression. As his accomplishments on El Capitan and Half Dome elevated him to hero status in the adventure sports world, his mental state began to fracture and his fierce competitive drive pushed him to try to outdo both himself and others, including rising star Alex Honnold. Ultimately, it was wingsuiting and his lifelong desire to fly that would prove to be his riskiest and most transcendent endeavour.
Drawing from decades of archival footage, Dean’s personal journals, and intimate interviews with those who knew him best, The Dark Wizard chronicles the triumphs, tragedies, rivalries, romances, and near-death moments that shaped the life of a brilliant yet tormented artist and athlete whose imagination and audacity redefined what the body and mind could do.
Episode 4 will be available to stream on HBO Max on 4th May 2026.
Peter Mortimer
Peter grew up in Boulder, Colorado where he learned to rock climb as a kid and made his first home videos of climbing and skiing exploits with friends. After graduating with a geology degree from Colorado College, Peter made his first "real" climbing film (Scary Faces, starring Zac Barr) then went on to get his MFA in film at USC. He's blended his life-long passion for climbing, travel & adventure with his love of telling stories about the incredible people he's met along the way. Peter lives in Boulder with his wife Joss, daughter Pia, son Xavi, and little dogs Macho and Gnarly.
Nick Rosen
Nick received his BA in political science from Colorado College, and his masters at Columbia's School of International and Public Affairs. Nick began working as a writer, producer & director for Sender in 2005, and since then has created award-wining feature films, TV programs and creative campaigns. Nick lives in Boulder, Colorado with his partner and two kids.
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Podcast music composed by michaelflemingmusic.com
Ross Whitaker is a filmmaker and former editor of Film Ireland Magazine and programmer of the IFI Dublin Documentary Film Festival @RossWhitakerTV
Ross is a producer and/or director of the feature documentaries Beat the Lotto (2025), Katie (2018), Between Land and Sea (2016), Unbreakable (2014) and Saviours (2007). His recent work includes the TV documentaries This Is Open Country (2025) for NBC/Sky, Birdsong (2024) for RTÉ (+ BBC, ARTE), Rachael Blackmore: A Grand Year (2021) for ITV/RTÉ, Barney Curley Beat the Bookies (2021) for BBC/RTÉ and The Boys in Green (2020) for RTÉ. His short documentaries include the award-winning Bye Bye Now (2009) and Home Turf (2011), as well as the documentary commercial Sleeping Flags (2019), which won prestigious D&AD and Cannes Lions Awards.
This episode has been made possible with the support of the Screen Ireland Stakeholders Fund.
