"Pilot": Pierce continually makes sexual advances on Shirley which is stopped by Jeff and commented on by Troy. He doesn’t seem to understand what he is doing is inappropriate and lashes back at those that criticize him.
"Introduction to Film": Pierce thinks Shirley is Troy’s mother. After Shirley really “seizes the day” and talks about her marriage, Pierce tells her his was “moved” by certain personal comments she made.
"Social Psychology": Shirley makes fun of Pierce bringing his mail to work and that his “earnoculars” make him look like “Inspector Gadget”. Shirley gives Vaughn’s poem to Pierce to read.
"Football, Feminism and You": When Pierce says there’s only one black hole worth studying, Shirley gives him a mean look expecting him to say something inappropriate. When he rattles off details of a galactic black hole, Shirley is mildly surprised.
"Introduction to Statistics": When Shirley indicates she’s taken off her wedding ring and is embracing being single, Pierce leers and says “message received”.
"Debate 109": While watching the final rounds of the debate, Pierce thinks he says “cross-burner” instead of “barn-burner” to Shirley.
"Environmental Science": Pierce gives Shirley presentation advice including wearing a dark top to hide sweat stains, eliminating filler words and using her hands to “hand them (the audience) a sandwich”. Surprisingly, Shirley remembers the latter when faltering in her presentation (and seeing Pierce eating a sandwich) and it starts her on the way to getting an “A” on it. She credits Pierce for his help.
"The Politics of Human Sexuality": In the study room, Shirley makes fun of Pierce’s call girl girlfriend.
"Comparative Religion"”: Pierce tells Shirley that he told Jeff to not fight while wearing boxing practice mitts. After the fight with Mike Chilada, Pierce plays keyboard while Shirley sings a modified version of “Silent Night”.
"Interpretive Dance": During Britta’s dance recital, Shirley continuously shushes Pierce when he makes comments.
"Romantic Expressionism": Pierce tries to exclude Shirley from watching a video in Abed’s room. Before the movie, he puts down Shirley indicating that they might have to wait while Shirley serves drinks. Later, when Pierce has prepared jokes for “Kickpuncher 2” but the rest want to watch “Runaway” it’s Shirley who relents. When the group realizes Pierce prepared jokes, he delivers a speech which Shirley says is deep and total B.S. When the study group is around the table and talk about possible relationships among them comes up, Shirley asks if anyone “gets specific” about her. Pierce says to check her email but she has marked him as spam. Pierce starts the suggestive glances around the table by looking at Shirley.
"Beginner Pottery": Pierce convinces Shirley to join the sailing class in the parking lot. When the jib hits Pierce, he tells Shirley she really screwed the pooch. Later, Pierce is hit overboard and Shirley orders the crew to abandon him. When Pierce comes back in a rowboat with wheels, Shirley orders the boat to be physically moved to save Pierce.
"The Art of Discourse": Pierce pants Shirley resulting in him being expelled from the group. He bungles a forced apology by mistaking another black woman for Shirley. Later, Pierce honks his car horn at Shirley. In the library Pierce makes up with Shirley by complementing her accomplishments as a woman and a mother. Pierce and Shirley pants two the high-schoolers that are engaging in a “duh war” with Jeff and Britta, allowing them to win. During the food fight, Pierce hits Shirley in the back with an orange and a caption appears beneath them indicating that they never married.
"Pascal's Triangle Revisited": When Annie and Vaughn are saying goodbye, Pierce mentions that none of them wanted Annie in the group. Shirley scolds him saying “Pierce”! Pierce counters with a great line “I say things others won’t, that has value”.