30 Rock Wiki

Dennis Duffy is the eccentric and mostly terrible, sometimes boyfriend to Liz Lemon. He is played by Dean Winters. Liz had dated him most recently in season 1 ("Jack Meets Dennis," "Tracy Does Conan" and The Break-Up). Liz's pros and cons list deciding her future with Dennis was ultimately tipped to the negative after she found out he had tried to have sex with a minor.

In spite of Liz's rejection, he returns in season 2 as the Subway Hero. He seemed to have impregnated Liz in "Cooter." He has had guest appearances in subsequent seasons.


  • Dennis plays Halo under the pseudonym "Slut Banger."