This is an interesting story for a unique source – a Dark Shadows fan site – that has information about Marvel's Agents of SHIELD. The report says that actress Kathryn Leigh Scott, who played Maggie Evans on Dark Shadows, has been cast in the mid-season premiere of Agents of SHIELD scheduled to air March 3rd. We don't know who she is playing, but she had this to say:
"The show is so secretive that I was never given a script, only my dialogue! I am going to respect their desire to keep the story a surprise … besides, I can't provide a synopsis because I have no idea what the story is. My episode will air mid-season and I will supply more information as I get it."
When the show does return, it will be roughly two months prior to Avengers: Age of Ultron so it is possible that plot for the episode and maybe even her role is starting to set up for the film. We know how drastically Captain America: The Winter Soldier changed the show last season, it would only stand to reason that the show will have strong ties to the Avengers sequel.
Besides her turn on the gothic soap opera, Scott has appeared in The Great Gatsby (1974), Magnum PI, Star Trek: The Next Generation, The Incredible Hulk and most recently The Goldbergs.
[Source: Collinsport Historical Society]