Im almost positive your father was listening to Coast to Coast hosted by George Noory. It was Art Bells show (which he takes over on the weekends) sometimes the subject matter is extremely interesting sometimes a little over the top: like an XFiles episode. Depending on the credientials of the guest is what will make it interesting. The guest will always have a link on the site so you can go back and check out past shows
www.coasttocoastam.com
I dont know the credentials of this latest guy, but Im interested to check them out.
Speaking of massive objects coming by for a visit; planet X is an interesting read. Reguardless of the debate of its exsistence; something is tugging on neptune.