Raccoon Stuck In Our Chimney

Daniel just called me down into the basement b/c he thinks there is a raccoon stuck in our chimney. Thankfully the flume is shut, but there is definitely something in the chimney. I have no idea how it is going to get out. There is no way that we can let it loose in our basement - that would be an absolute disaster!

Does anybody have any suggestions as to how you can safely remove a raccoon from your chimney???