Specifically, a spokesperson for Warner Bros. TV says that Collins will appear as a guest star in Episode 17 as well as in “at least two additional episodes” beyond that — though not necessarily as fallen angel Castiel.
“It has always been our intention to bring back Misha in some form,” executive producer Sera Gamble hedged shortly after Castiel famously exited the canvas earlier this season. “We certainly can’t say too much about where the story is going to go, but we love Misha and want to continue to work with him.”
This past Friday, Supernatural aired this season’s 10th episode, which served as the fall finale. The CW series returns with fresh episodes on Jan. 6.
Around or before the time Collins resurfaces on Supernatural, he will also be guesting on The CW’s Ringer, appearing in that freshman thriller’s 14th episode.