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.
Are there any other interesting aspects about the Rowan & Martin's Laugh-In article?
Rowan & Martin's Laugh-In won an Emmy in 1971 for Outstanding Directorial Achievement in Variety or Music, Mark Warren (episode #4.7 with Orson Welles)
Did Rowan & Martin's Laugh-In win any other awards besides the 1971 Emmy for Outstanding Directorial Achievement in Variety or Music?
Rowan & Martin's Laugh-In won a Golden Globe Award 1973: Best Supporting Actress – Television, Ruth Buzzi

Question: What else was going on with the seasons
Self-contained rewrite: What else was going on with the seasons 4 and 5 of Rowan & Martin's Laugh-In besides new additions to the cast, 100th episode, and awards?