 Perry has described the production " ... Thirteen Years Later " as being " one of the most gruelling " of the series ' run , citing its abundance of stunt work and physical effects as the cause of this . Perry praised Wright for his ability to direct the episode within the usual time constraints , as he felt the number of shots involved was more akin to a feature film than a television episode . Guest star Jeff Yagher , who played killer Mark Bianco , is the husband of actress Megan Gallagher , who starred in the first two seasons of Millennium as Black 's wife Catherine . 
