Legendary actress Jane Seymour will guest-star in three episodes of the new ABC comedy series, In Case of Emergency. Her first episode airs Wednesday, Feb. 14 (9:30-10:00 p.m., ET/PT). Seymour will play Jason's mother, Donna.

In her first episode, "Oh, Henry!," Jason, on the verge of going to jail, can cut a deal if he rats on his Uncle Henry, who happens to be Donna's favorite brother. Jason begs Harry to help him with Donna because she always favored Harry over him. Things quickly get hot when Donna starts flirting with Harry and makes a pass at him. But the fireworks don't end there, as Donna asks Harry to give her a ride home alone.