[Knative]

What are the two conflicting shows? Or, more importantly, does one of the two repeat later in the day/week? With the major networks (ABC, CBS, NBC) you might be out of luck. But if one or both is on a 'cable' channel (TBS, HBO, TNT, Sci-Fi, etc.) there will usually be a repeat that you can catch later that night or later in the week.

Pull up the show by name and hit "View Upcoming Episodes" to see if one of the two repeats. If one does, put it just below the non-repeating show in the SPM.