William Winger is Jeff Winger's father who left Jeff at a very young age. Jeff's abandonment issues as well as his animosity towards his father because of it had been obliquely referenced by him during his time at Greendale. William is eventually contacted by Jeff in order to get some closure. His first appearance was in the Season Four episode "Cooperative Escapism in Familial Relations". He was portrayed by actor James Brolin.
Jeff first mentions his father when he temporarily moves in with Abed in his dorm room. He casually tells Abed how his dad would come home drunk, at one time left him at the zoo and also abused and insulted him ("Home Economics").
We first hear of his name in episode 14; Advanced Dungeons and Dragons, when the narrator says "Jeff the liar, son of William the barely known." In Jeff's second year at school, more information is provided by Pierce when he investigates Jeff's dad as part of an elaborate prank to get back at the study group for constantly excluding him. According to the information Pierce was able to find out, William Winger was born in Oklahoma City in 1945 (making him sixty-seven years old), married Jeff's mother Doreen Fitzgerald in 1974, and then divorced her in 1983. Jeff adds that he was a "two-bit con man of very little substance". ("Intermediate Documentary Filmmaking").
In Jeff's third year at school, Jeff realizes he has serious daddy issues after confronting Pierce's father Cornelius Hawthorne and accidentally causing his death ("Advanced Gay"). Jeff announces to the group he is in therapy ("Regional Holiday Music") and later explains how he talked about his father and punched a few pillows before being prescribed some anti-anxiety meds ("Contemporary Impressionists"). During Shirley's wedding rehearsal, Jeff gets drunk and publicly declares his hatred of the institution of marriage comes from the fact that his father promised to stay forever with his mom but ended up leaving. At the end of the year, Jeff is shown to be searching online for his father ("Introduction to Finality").
In Jeff's senior year at school, he reveals to Britta that he located his father and has his phone number but has yet to contact him. After some contemplation, he later calls him ("Paranormal Parentage"). He learns he has a half-brother named Willy Jr. and he and his father agree to have Thanksgiving dinner together. When Jeff arrives at his fathers place he becomes overwhelmed by the situation and flees. He contacts Britta who had been encouraging him to see his dad and lies about the reunion claiming to have gotten closure. He then learns that she knows he is lying as she is there at his father's house. Annoyed that she interjected herself into a personal matter, he returns to the house. He confronts Britta who is apologetic about her meddling in his private affair. He then steels his resolve to see this through. Jeff knocks on the front door where he is greeted by his father William Winger.
After some awkwardness, Jeff and William create some ground rules for the dinner and agree to try and not turn the situation into an overly emotional affair. William introduces Jeff to his half brother, Willy Jr., who is immediately jealous of him. William and Jeff settle into a comfortable dynamic and discuss what's been going on since they last saw each other. William is shown to be overly critical and slightly abusive of Willy Jr. and praises Jeff for having turned out so well adjusted. He then suggests that leaving him as a kid seems to have made him a stronger person, particularly in comparison to his half-brother Willy. Jeff is angered by his "compliment" and storms out.
Later, William is getting wine glasses from the kitchen when Jeff suddenly returns. He calmly explains to his father how wrong his assessment of him is. Jeff proclaims himself to be a broken person who composes fake text messages on his phone rather rather then open himself up to his friends. He credits William with that who scoffs at the notion but Jeff cuts him off before he can defend himself and continues. Jeff describes the ridiculous and sometimes dangerous lengths he went to in order to replace the loss of his father. In seventh grade, he lied to his classmates about having just had an appendicitis just so someone could worry about him. He needed to make a scar so it would look legit so he grabbed a pair of scissors and made one.
He shows off the scar to his father and credits him with that as well. William is about to respond when he suddenly keels over and drops the wine glasses which shatter as they hit the floor. Wily Jr. calls out to his father but both Jeff and Britta know better having seen Pierce pull this stunt many times before. Jeff looks on with disapppointment and asks his father if he is faking a heart attack. Realizing its not working, William abandons the ruse and admits the charade "was kind of a Hail Mary." Jeff sighs heavily and wishes his father a happy Thanksgiving before leaving with Britta.("Cooperative Escapism in Familial Relations").