Torchwood - Season 4 Episode 8

The team is taken to see Olivia Colisanto, in whose house her grandfather, Angelo, ancient and comatose, lies on a life support machine. She explains that in 1928, three mobster families, named Ablemarch, Costerdane, and Frines, tapped Jack's blood to gain immortality – the Blessing. Those families have now disappeared but seem to hold the key to Miracle Day. Angelo dies, baffling new CIA boss Shapiro, who deports Gwen. Jack finds a link between Angelo's death and a plate containing a mysterious force field under his floor. He gets Esther to take it and him to safety whilst Jilly tells Oswald that he is expendable.