Unexplained Channel ended in 2010.
The Unexplained ended on 2000-05-07.
Unexplained Mysteries ended on 2004-05-29.
Assignment Unexplained - 2012 End of the World 3-1 was released on: USA: 7 October 2012
Encounters with the Unexplained - 2000 Biblical End Times Are End Time Warnings True 1-8 was released on: USA: 27 October 2000
Encounters with the Unexplained - 2000 Has the Lost Colony of Roanoke Been Found Are the End Times Here was released on: USA: 5 July 2002
I may be missing something here, along the lines of a definition, but isn't the 'forward' channel at one end of the link the 'reverse' channel at the other end, and isn't the 'reverse' channel at the first end the 'forward' channel at the opposite end ?
The Preview Channel ended in 1998.
Channel Airways ended in 1972.
Audi Channel ended in 2009.
The Baby Channel ended in 2008.
The Life Channel ended in 1986.
Channel Express ended in 2002.