A couple Ghost Whisperer casting notes to pass along:
* Margaret Cho (pictured) will reprise her role as a teacher of the occult for two more episodes. Says Producer Ian Sander: 'She's going to help solve some crimes."
* The Shield actress Catherine Dent will also come aboard a future installment, portraying a drunken ghost named Laura. 'It was really fun playing a drunk because I could show up to work looking like crap," said Dent.
The show airs its 100th, Jennifer Love Hewitt-directed episode this week.