January Jones and Jon Hamm with Oprah.

Our own Jon Hamm (Don Draper on “Mad Men”) and January Jones (Betty Draper) will be guests today on a “Mad Men”-themed episode of “Oprah Winfrey” (4 p.m. on KSDK, repeated at 1:35 a.m.). Here are the details, from Oprah’s people:

Tune in Monday, Sept. 21, as Oprah takes a trip back in time to the 1960s!  Inspired by the pop culture phenomenon of AMC’s Emmy and Golden Globe winning series “Mad Men,” this very special episode will feature a blast-from-the-past ’60s themed set, a studio audience decked out in their best ’60s costumes, and appearances by “Mad Men” Golden Globe winner Jon Hamm and January Jones, a performance by the Jersey Boys and some surprise guests. Even Oprah herself goes “Mad Men” with a one-of-a- kind dress created by the show’s Emmy winning costume designer, Janie Bryant. Plus, Oprah unveils what would have been her “Favorite Things” from the 1960s.