Complex sentence: Klugman also appeared on the very first week of the 1970s revival of "Match Game" and then from time to time filled in for his then-wife, Brett Somers, when she became a regular on the program a few weeks later.
Split into simpler sentences: Klugman also appeared on the very first week of the 1970s revival of "Match Game". From time to time, he filled in for his wife, Brett Somers, when she became a regular on the program a few weeks later.