>> i'm here to fight for truth and justice and the american way. >> reporter: it took the celebrity profile to new heights. >> here i am like a kid out of school, holding hands with a god. >> reporter: kidder's combination of pluck and vulnerability won her the part. in real life she was vulnerable. suffering from mental illness as she told diane sawyer. >> i could have gotten better years and years ago if i had the courage to face that something was wrong. >> reporter: for most of us margot kidder will always be lois lane. >> evening, miss. i've got you. >> you've got me? who's got you? >> reporter: david right, abc news new york. >> always lois lane. thank you for watching tonight. i'm david muir. i hope to see you back here tomorrow. until then, good night. for the first tame tonight, hearing from a mother of a