Gosnell, the feature film about Philadelphia abortion doctor Kermit Gosnell, moved forward in production this week, with filmmakers announcing the addition of actor Dean Cain to the cast.

Cain, who starred as Clark Kent in ABC's 90s TV series, Lois & Clark, joins the film as District Attorney's Detective James Wood, who investigated Gosnell as part of the case that saw him convicted on one count of manslaughter and three counts of murder.

Character actor Earl Billings, meanwhile, will portray Kermit Gosnell. He is best known for his appearances in movies such as American Splendor, Con Air, and Thank You For Smoking.

Initially pitched as a made-for-TV movie, Gosnell has since expanded into feature film territory following a successfully funded Indiegogo campaign, which netted filmmakers more than $2 million in funds.

Justified's Nick Searcy is attached to direct the film, which draws much of its inspiration from a 280-page grand jury report from the Gosnell case, as well as a Philadelphia magazine report-turned-e-book by journalist Steve Volk, which Gosnell's makers optioned late last year. However, according to Hollywood Reporter, the movie will also focus on "what filmmakers say was a media cover-up that lasted decades" as part of the story.

Earlier this week, the film inspired some outrage when Gosnell's producers, who include the creator of GasLand-debunking doc FrackNation, Phelim McAleer, announced their need for hundreds of volunteers in the form of extras for a wedding scene in the upcoming movie.

"You will have an opportunity to be a part of this important untold story that the mainstream media covered up," a casting notice read.

Gosnell is currently filming in Oklahoma City.