Final episode with Gloria having her hair in a "perm", with the exception of season eight's flashback episode "Mike and Gloria Meet", with Sally wearing a wig.
While in the hotel room with her roommate Edith is discussing the trial case. This would be violation of the court rules from the judge.
This is the first episode that Archie tells Meathead to get out of his chair, simply by saying the word chair while looking at Mike.
The song Mike and Gloria were listening to on the TV was Sly and the Family Stone's "Let Me Take You Higher" from their 1969 album "Stand!", which included the #1 single "Everyday People".
Archie is reading the February 23rd, 1971 edition of the New York Daily News newspaper.