Dennis Duffy is a fictional character portrayed by Dean Winters in the TV series 30 Rock.
In the first episode they appeared in, titled Jack Meets Dennis (season 1), they were 42 years old.
They appear in 15 episodes out of a total of 138 aired and have accumulated 51 positive votes.
Episodes15
Jack Meets Dennis
episode S1.E6 november 2006Liz is back with her ex-boyfriend Dennis, a man she realizes is the rat king. Jack warns her of him but she is defiant. Jenna lies about her age to Jack, starts feeling old and does something to look younger. Tracy fears being normal.
Tracy Does Conan
episode S1.E7 december 2006Jack has Jenna bumped from the Conan show for Tracy, making her think he doesn't respect her. Tracy fears being boring on Conan and behaves crazier. Liz deals with wanting to break up with Dennis and the fact that she wants to break up.
The Break-Up
episode S1.E8 december 2006Jenna takes Liz out on the town after she breaks up with Dennis, Jack is having problems with his new relationship, and Tracy and Toofer clash over negative African American stereotypes.
Subway Hero
episode S2.E12 april 2008Jack asks Liz to get her ex-boyfriend Dennis for the show after he becomes a hero for saving someone at a subway station, and tries to get Tracy to become an African-American spokesman for the Republican party.
Cooter
episode S2.E15 may 2008Liz has a positive pregnancy test, and thinks that Dennis is the father. Meanwhile, Jack regrets taking the Homeland Security position, Tracy finishes his pornographic video game, and Kenneth tries to get a job at The Olympics.
Apollo, Apollo
episode S3.E16 march 2009Liz is upset when she finds out that her ex-boyfriend Dennis slept with Jenna, Jack reminisces about his youth on the eve of his birthday, and Tracy prepares to go into space.
Anna Howard Shaw Day
episode S4.E13 february 2010Liz can't get anyone to give her a ride home from her oral surgery, which is scheduled for Valentine's Day. Meanwhile, Jack goes out on a date with a sexy, smart journalist, and Jenna discovers that her stalker has moved on.
Emmanuelle Goes to Dinosaur Land
episode S4.E21 may 2010Jack's relationship-juggling becomes more complicated when Nancy makes an unexpected visit, Liz reluctantly selects Wesley as her date to a wedding, and Tracy considers taking a role that could win him an Oscar.
Operation Righteous Cowboy Lightning
episode S5.E12 january 2011Jack tries to put together a benefit for a disaster that hasn't happened yet, Liz and Tracy come to blows as reality show cameras follow Tracy around, and a mock disaster scenario gives Lutz a rare position of control with the writers.
100: Part 1
episode S5.E20 april 2011When Hank Hooper threatens to cancel "TGS", Jack convinces him to allow Liz and company the chance to do their 100th episode. To produce the best show possible, however, Liz must deal with less-than-ideal working conditions. Amidst the chaos of show preparation, Jack starts doubting a key decision in his life and Jenna contemplates motherhood.
100: Part 2
episode S5.E21 april 2011When Hank Hooper threatens to cancel "TGS", Jack convinces him to allow Liz and company the chance to do their 100th episode. To produce the best show possible, however, Liz must deal with less-than-ideal working conditions. Amidst the chaos of show preparation, Jack starts doubting a key decision in his life and Jenna contemplates motherhood.
Hey, Baby, What's Wrong?: Part 1
episode S6.E6 february 2012Liz and Criss's relationship is put to the test during a trip to IKEA, Jack discovers that he and his mother-in-law are attracted to each other, Kenneth trains his assistant, and Jenna gets the "yips" before an important performance.
Hey, Baby, What's Wrong?: Part 2
episode S6.E7 february 2012Criss and Liz decide to celebrate Valentine's Day, but they need to buy a dining room table first. Jack entertains his mother-in-law, Diana, as Jenna frantically looks to Pete to fill in last-minute as the producer of her first live performance on "America's Kidz Got Singing." Back at the office, Tracy and Frank try to help Lutz find someone to spend Valentine's with.
St. Patrick's Day
episode S6.E12 march 2012Dennis shows up at Liz's apartment on St. Patrick's Day and drives a wedge between Liz and Criss. Meanwhile, Tracy and Jenna fight over top billing in the St. Patrick's Day parade, and Jack plays a fantasy board game with the writers.
Mazel Tov, Dummies!
episode S7.E7 november 2012Liz and Criss agree to get married, but Liz refuses to have a conventional wedding. Meanwhile, Tracy comes to terms with the fact that he will grow old, and Jenna discovers her true cash value as a human being.
- Jack Meets Dennis
- Tracy Does Conan
- The Break-Up
- Subway Hero
- Cooter
- Apollo, Apollo
- Anna Howard Shaw Day
- Emmanuelle Goes to Dinosaur Land
- Operation Righteous Cowboy Lightning
- 100: Part 1
- 100: Part 2
- Hey, Baby, What's Wrong?: Part 1
- Hey, Baby, What's Wrong?: Part 2
- St. Patrick's Day
- Mazel Tov, Dummies!
Best moments5
- Liz is back with her ex-boyfriend Dennis, a man she realizes is the rat king. Jack warns her of him but she is defiant. Jenna lies about her age to Jack, starts feeling old and does something to look younger. Tracy fears being normal.
- Jack has Jenna bumped from the Conan show for Tracy, making her think he doesn't respect her. Tracy fears being boring on Conan and behaves crazier. Liz deals with wanting to break up with Dennis and the fact that she wants to break up.
- Jenna takes Liz out on the town after she breaks up with Dennis, Jack is having problems with his new relationship, and Tracy and Toofer clash over negative African American stereotypes.
- Jack asks Liz to get her ex-boyfriend Dennis for the show after he becomes a hero for saving someone at a subway station, and tries to get Tracy to become an African-American spokesman for the Republican party.
- Liz is upset when she finds out that her ex-boyfriend Dennis slept with Jenna, Jack reminisces about his youth on the eve of his birthday, and Tracy prepares to go into space.
- Jack Meets Dennis
- Tracy Does Conan
- The Break-Up
- Subway Hero
- Apollo, Apollo