As previously reported, Bomer will play the older brother of Blaine Anderson, played on the series by Criss. In the episode, which is titled "Big Brother," the duo will perform a mashup of classics from the '80s rock band.
Bomer, best known for his work on USA Network's "White Collar," has also been seen in "All My Children," "Guiding Light," "North Shore" and "The Texas Chainsaw Massacre: The Beginning," among others. The actor also recently signed on to play Felix Turner in the film adaptation of Larry Kramer's The Normal Heart.
"Glee" airs Tuesday nights on Fox at 8 PM ET.