with 4 episodes premiered on Invalid Date

with 22 episodes premiered on September 23, 2005

with 22 episodes premiered on September 22, 2006

with 18 episodes premiered on September 27, 2007

with 23 episodes premiered on October 3, 2008

with 22 episodes premiered on September 24, 2009

The fifth and final season leaps five years into the future, where Melinda's son Aiden is already conversing with ghosts and her husband Jim has become a doctor.