WHO DO YOU THINK YOU ARE?
NBC, 8:00 p.m. ET
SEASON PREMIERE: In this first episode of the new season of celebrity roots-seeking, Martin Sheen retraces his family tree not only in search of relatives, but in search of proof of hereditary activism. And he find it, back in both Ireland and Spain. You’ll have to watch, though, to learn whether Sheen finds any genealogical traces of his son Charlie’s particular strain of tiger’s blood.