In a collision of television and internet stardom, Firefly and Castle star Nathan Fillion and YouTube star Michael Buckley are going to be appearing — together — in the new web comedy Husbands The Series, in an episode to be released this Tuesday, Sept. 20th. Fillion, an established television presence made a previous standout web appearance in Joss Whedon’s Dr. Horrible’s Sing-Along Blog, while Buckley’s What the Buck web show reaches over a million YouTube subscribers.

Husbands The Series, called the “first marriage equality comedy,” comes from creators Jane Espenson, Brad Bell. It is directed by Jeff Greenstein who shares the executive producer title with Espenson and Bell.

Former Emmy Nominee Espenson is a writing veteran of many shows including Ellen, Buffy the Vampire Slayer, Firefly, Dollhouse, Battlestar Galactica, Torchwood, and Game of Thrones among others. Director Greenstein also comes with a long tv backstory, having written for shows including Dream On, Friends, Will and Grace, and Desperate Housewives. Brad Bell, also known as Cheeks, is primarily known for his work on web projects that appear at his YouTube channel, GoCheeksGo.

“Cheeks and I combine web and television backgrounds, ” says Jane Espenson, “and adding Nathan Fillion and Michael Buckley continues that pattern. We are so proud of Husbands and we wanted to include people whom we love and respect — from both worlds — in the process.”