Since 2003 Mags Gavan has been making documentaries for TV and cinema together with Joost van der Valk.
They made series such as Paparazzi I (3 x 60' for BBC, 2004) Paparazzi II (4 x 60' for BBC, 2005) and Britain’s Ugliest Models (4 x 50' for Channel 5, 2009), and current affairs documentaries such as Bad Blood (BBC Newsnight, 2007), Saving Africa's Witch Children (55' for Channel 4’s Dispatches, 2008), Return to Africa’s Witch Children (50’ for Channel 4, 2009), Wilders: Europe’s Most Dangerous Man? (60’ for BBC, 2011) and Sisters of Somalia (30’ for Al Jazeera, 2013).
Lately the filmmaking couple has mostly focused on feature-length documentaries, such as Crips: Strapped 'n Strong (84’, 2009), Fighting for Peace (2015) and Satudarah-One Blood (2015). Satudarah-One Blood gives a unique insight into the secret world of an internationally operating outlaw motorcycle gang. It got the highest viewing figures for a documentary in the Netherlands ever and was nominated for the Dutch Academy Award for Best Documentary Feature.
Currently the couple is working on a series for a big American channel, another series for VICELAND, a one-off about the illegal kidney trade and a feature documentary set in Uganda.