Cast members Betty White and Georgia Engel will be joined in an episode of Hot In Cleveland by Cloris Leachman, Valerie Harper and Mary Tyler Moore. It will be the first time the cast has reunited in years and will probably mark the final time Valerie Harper appears on television. Earlier this month, Valerie Harper announced she has terminal cancer and is expected to live just three months. The premise of the reunion will be Betty and Georgia getting together with their former bowling team members the Gorgeous Ladies Of Bowling.
Source:
http://www.crazydaysandnights.net/2013/03/mary-tyler-moore-cast-to-reunite-in-hot.html