Tonight... get on the record with Greta...

They have disappeared under mysterious circumstances... We'll update you on the missing cases we've been following.

And where is the Hargon family (search) of Mississippi?

What's the latest on the Dru Sjodin (search) case?

Don't miss a special edition of "On the Record" tonight at 10 p.m. ET!

--All topics and guests subject to change.

--The Associated Press contributed to this story.