[citation needed] He presented the weekly movie segment on the Network Ten morning program The Circle from 2010 until it was axed in August 2012.

[8] He also co-produced a web series about movie trailers, Coming Sooner, with Nick Hayden and Nicholas McDougall.

[14] Fennell hosts the ABC's technology radio program Download This Show which examines the latest developments in social media, consumer electronics, digital politics, hacktivism and online privacy.

[19] In addition to his main role co-hosting, Fennell's prerecorded segments became a feature of the show, most notably his interviews with film and television stars.

[22] The show, described as "an exciting, rich and entertaining half hour of news, culture and politics from India and the subcontinent" is made by the creators of Planet America and China Tonight.

[25] In 2019, Fennell created It Burns, a podcast series covering the global race to grow the hottest pepper.

[30] In 2023, he presented The Kingdom, a feature-length SBS documentary which premiered on 11 June 2023 and which investigated his former Pentecostal religion, in particular the successes and controversies of the Hillsong Church and the rise in new megachurches in Australia.

In 2012, iTunes Australia named Download This Show the best new podcast, and it has won Best Audio Program at the Australian IT Journalism Awards ("The Lizzies") many times.