Mader, who played Charlotte Lewis in the drama, told TV Guide that she talks about the ending with confused viewers.
"People will come up and beg me to explain it," she said.
"In some way, I feel like people's Lost therapist, helping them to come to grips with what happened. I'll say, 'Sit down, we'll have a cup of tea, and I'll try to help you understand'."
Mader recently signed up for a role in No Ordinary Family and will make her debut in tonight's episode, which airs at 8/7c on ABC.