Alec Baldwin makes a scandalous return to 'Will & Grace'

Alec Baldwin returned to Will & Grace to reprise his role as Karen's secret lover, Malcolm Widmark. Karen had previously had an affair with Malcom while going through a rough patch with her husband, Stan.

While it seemed that their tryst had ended, in the latest episode it was revealed that they meet once a year for a weekend of passionate love making. And since Karen is still married, they have to keep it completely confidential.

It didn't take long before they were outed by Jack, who was very disappointed in Karen. Jack said,  Karen, you and Stan have always been the example of true love to me... I was naive to think that there was such a thing as happily ever after. "

Upset over the whole ordeal, Malcolm asks Karen to leave Stan to be with him. The episode ends with Karen contemplating how she is going to get of the mess she's helped make.

Will & Grace airs Thursdays at 9 p.m. on NBC.