Did Jesus Believe in Ghosts?

The Bible's world is crowded and unsystematic: ghosts, familiar spirits, demons that cause illness, and the dead who can be summoned. And at times, this world breaks through in ways modern readers don't always appreciate. When the disciples see Jesus walking on the water, their first thought is that he's a ghost. After the resurrection, Jesus has to reassure them he isn't one. King Saul has a medium call the prophet Samuel up from the dead, and it works.
So what happened to all those ghosts? Bart joins host Megan Lewis to explore the haunted world the Bible was written in, and how later Christians tidied it into a neater system of angels and demons, heaven and hell. Along the way: why demons were blamed for illness, why Jesus was accused of sorcery, and why believing in angels but not ghosts turns out to be a choice Christians made, not one the Bible made for them.