Conversation so far:
What is significant during the Rowan & Martin's Laugh-In season 4?
The 1970–71 Rowan & Martin's Laugh-In brought new additions to the cast include sad-eyed Dennis Allen, comic actress Ann Elder, tap dancer Barbara Sharma, and Johnny Brown.

Question: What else happened during this season?
Self-contained rewrite: What else happened in Rowan & Martin's Laugh-In season 4 besides new additions to the cast including sad-eyed Dennis Allen, comic actress Ann Elder, tap dancer Barbara Sharma, and Johnny Brown?