they include three of the grateful dead surviving core four, mickey heart, and bob weir, joined by john. >> yes. >> like 1930's boxer. >> the keyboard player and almond brothers basis, and it is the line up, has change, but catalogue has not. the crowded fillmore to hear the grateful dead. >> you know, it requires a little adventure and you can watch the faces over the years, front row stays the same age. >> that feels good to you. >> it is great. >> dan and company, came together last fall and younger members are still learning to keep up, with the dead's >> ♪ >> how often do you get where the hell is he going with this. >> in this band, where the hell am i going with this. >> there has to come a moment where it is has to play a guitar solo and i'm not wondering, what bob thinks about it. >> do you feel it out there. >> yes. >> first time i played with john, i can handle it. >> weir and mayer connect when they played together on the tv show early last year. >> we were going to have something to say, yeah. >> it was only time i ever got nauseous, playing music. >> the return of the dead