Conversation so far:
When did season 4 of Rowan & Martin's Laugh-In come out?
1970–1971.
Who were the cast of Rowan & Martin's Laugh-In season 4?
The 1970–71 season brought new additions to the cast including Dennis Allen, comic actress Ann Elder, who also contributed to scripts, tap dancer Barbara Sharma, and Johnny Brown.
what happened in season 5 of Rowan & Martin's Laugh-In?
The show celebrated its 100th episode during the 1971–72 season. John Wayne was on hand for his first cameo appearance since 1968.

Question: Are there any other interesting aspects about this article?
Self-contained rewrite: Are there any other interesting aspects about the Rowan & Martin's Laugh-In article?