You had a seance with Carl? Remarkable.
No. I don't need a seance--God's word (the Bible) tells us not to consult mediums or spiritists.
What I DO know is that unless Sagan had a deathbed conversion [possible but unlikely], he is in hell right now. If you don't repent and turn from your sins, you'll be joining him. I wouldn't want that to happen to you.