better about ourselves. >> reporter: this sunday the show's third season ends but fear not, zombie fans. it's still alive. season four begins in october. than guy at the end there was john bernthal who is on seasons one and two. i had a conversation with him this morning and he explained the reason the show is so successful is because it marries two audiences, this comic sci-fi horror thriller audience that would watch the show no matter what and then also the really intellectual high brow crowd that likes mad men and breaking bad also on amc. so that's why they think they're getting these tens of millions of viewers for each show. >> it is going to be very challenging especially for the geeks because the season premiere of "game of thrones" on hbo is the exact same time as the season finale of "walking dead" on sunday night. it's a dilemma and we should also note that tomorrow we will have a special preview of "game of thrones" with wuchb the