In the late 1990s Maggs produced several series of It's Been a Bad Week and The Russ Abbot Show for Celador Productions, aired on BBC Radio 2.

Starring Andy Secombe in his father's role of Neddie Seagoon and featuring the John Wilson Orchestra, it became in the words of Maggs, "a genetically-engineered tribute band" to the Goons.

He started in 1988 with the 50th Anniversary Man Of Steel docudrama Superman on Trial, carried on with a 50th birthday tribute to the Dark Knight: Batman: The Lazarus Syndrome.

Maggs directed adaptations of several Agatha Christie short stories for Radio Four, and a production of Bill Naughton's Alfie for the BBC World Service.

This was followed by Executive Producing and adapting from the IDW comic book continuation by Joe Harris, The X-Files as a full-cast audio drama reuniting David Duchovny and Gillian Anderson as Mulder and Scully, with Mitch Pileggi as Skinner and William B. Davis as a different iteration of the Cigarette-Smoking Man.

On July 15, 2020, Audible released an adaptation of the comic book series as a multi-part audio drama directed by Dirk Maggs with music by James Hannigan.

[2][3] The voice cast included Gaiman as the Narrator, James McAvoy as Dream, Kat Dennings as Death, Taron Egerton as John Constantine, Michael Sheen as Lucifer, Riz Ahmed as the Corinthian, Andy Serkis as Matthew the Raven, Samantha Morton as Urania Blackwell, Bebe Neuwirth as The Siamese Cat, Arthur Darvill as William Shakespeare, and Justin Vivian Bond as Desire.

The production spent two months at #1 in The New York Times Best Seller list The follow-up, The Sandman: Act II, was released on 22 September 2021, and featured most of the original cast.

New additions to the cast included: Regé-Jean Page as Orpheus, Jeffrey Wright as Destiny, Brian Cox as Augustus, Emma Corrin as Thessaly, John Lithgow as Joshua Norton, David Tennant as Loki, Bill Nighy as Odin, Kristen Schaal as Delirium, Kevin Smith as Merv Pumpkinhead, and Niamh Walsh as Nuala.

For the feature-length animated film of The Magic Roundabout, Maggs voice-directed principal character sessions with actors including Robbie Williams, Kylie Minogue, Jim Broadbent, Ray Winstone and Joanna Lumley.

Maggs is credited as Voice Director on the highly acclaimed adventure game, Broken Sword: The Sleeping Dragon featuring Rolf Saxon and Sarah Crook.