A medical device comprising: a communication module configured to receive electrogram signal data from an implantable medical device, the EGM signal data including a plurality of cardiac episodes, each of the plurality of cardiac episodes classified by the implantable medical device as at least one of a ventricular tachycardia/ventricular fibrillation (VT/VF) episode, a supraventricular tachycardia episode, a ventricular tachycardia no stimulation (VTNS) episode, an atrial tachycardia/ atrial fibrillation (AT/AF) episode, a monitored VT episode, or a ventricular oversensing episode; a processor configured to: conduct a retrospective analysis for each of the plurality of cardiac episodes, the retrospective analysis providing a retrospective analysis classification; and select a subset of the plurality of cardiac episodes for display based at least in part on at least one of the implantable medical device classification and the retrospective analysis classification, wherein for each episode category including at least one episode, the subset includes greater than or equal to one episode and less than or equal to a predetermined number of episodes; and a graphical user interface configured to display a summary of the selected subset of the plurality of cardiac episodes; and characterized in that the graphical user interface is further configured to display a thumbnail of a portion of the EGM signal for each of the subset of the plurality of cardiac episodes; wherein the processor is further configured to select the portion of the EGM signal in the thumbnail based on a portion of the EGM signal used to make the retrospective analysis classification. a communication module configured to receive electrogram signal data from an implantable medical device, the EGM signal data including a plurality of cardiac episodes, each of the plurality of cardiac episodes classified by the implantable medical device as at least one of a ventricular tachycardia/ventricular fibrillation (VT/VF) episode, a supraventricular tachycardia episode, a ventricular tachycardia no stimulation (VTNS) episode, an atrial tachycardia/ atrial fibrillation (AT/AF) episode, a monitored VT episode, or a ventricular oversensing episode; a processor configured to: conduct a retrospective analysis for each of the plurality of cardiac episodes, the retrospective analysis providing a retrospective analysis classification; and select a subset of the plurality of cardiac episodes for display based at least in part on at least one of the implantable medical device classification and the retrospective analysis classification, wherein for each episode category including at least one episode, the subset includes greater than or equal to one episode and less than or equal to a predetermined number of episodes; and conduct a retrospective analysis for each of the plurality of cardiac episodes, the retrospective analysis providing a retrospective analysis classification; and select a subset of the plurality of cardiac episodes for display based at least in part on at least one of the implantable medical device classification and the retrospective analysis classification, wherein for each episode category including at least one episode, the subset includes greater than or equal to one episode and less than or equal to a predetermined number of episodes; and a graphical user interface configured to display a summary of the selected subset of the plurality of cardiac episodes; and characterized in that the graphical user interface is further configured to display a thumbnail of a portion of the EGM signal for each of the subset of the plurality of cardiac episodes; wherein the processor is further configured to select the portion of the EGM signal in the thumbnail based on a portion of the EGM signal used to make the retrospective analysis classification.