The former Lost actress will appear in a three-episode arc as Global Tech executive Victoria Morrow beginning on January 11 and told io9 that she was uncertain about her character's future.
"I'm shooting the third [episode]," she explained. "I don't really know [her fate] yet because I haven't shot [my final] scene yet. It's ambiguous. It doesn't look good, but it's ambiguous."
Mader explained that she will appear alongside Stephen Collins (Dr. King) and Autumn Reeser (Katie) in several scenes.
"It's not just with Stephanie [Powell, played by Julie Benz]," she said. "I work at Global Tech, but I have some nice scenes with Stephen Collins and Autumn Reeser. I'm not in the Powell House in the first episode, though."
She also confirmed that Morrow shares a connection with Dr. King and his mysterious ally The Watcher (Josh Stewart).
"In the first episode, it sort of alludes that there is some history there, but it's not established yet as to what it is," she revealed.
No Ordinary Family continues on Tuesdays at 8/7c on ABC.