10/13/2011 09:55 am ET Updated Dec 13, 2011

Jon Hamm Spotted On 'Mad Men' Set (PHOTOS)

It looks like Don Draper is having a lovers' quarrel with his fiance, Megan Calvet.

The pair, who were engaged at the end of the fourth season of "Mad Men" were spotted having a little on-screen spat Wednesday in Los Angeles, Calif. Don and Megan, played by Jon Hamm and Jessica Pare, were shooting scenes for the highly anticipated fifth season and from the looks of these photos, their romance may be hitting a rough patch. Take a look at the photos of the duo as they have a heated argument outside a Howard Johnson motor lodge.

Although the series isn't set to return until next year, the cast is back to work in full force. Earlier this week January Jones made her return to set, after giving birth to her son Xander, to portray her icy character, Betty Draper Francis.