i'm derek. >> nic paravicini: ...know where the other person's hand is going to come from. and he'll say, "i'm derek." >> derek: i'm derek, pippa. >> nic paravicini: i remember once coming out of... out of church, and we had the archbishop of canterbury there. >> stahl: eww. >> nic paravicini: yes. and i said, "you're going to now meet the archbishop of canterbury." of course, derek said, "hello. i'm derek. hello, archbishop of canterbury." ( laughter ) it's... it's very... it's very engaging, though. the ar... of course, the archbishop loved it. >> derek: see you on friday, kelly. >> ockelford: derek's an extraordinarily warm person. to be honest, if he was just a musical computer, he wouldn't be that interesting. but his real love is actually people. and music is... is his way to get to people... >> derek: hello, florence. >> ockelford: and to help people. >> stahl: now, i understand that he's actually begun to work with older people. >> ockelford: as people get older and they start to lose some memories and languag