To the Last Man (S02E03)

Toshiko falls for a handsome soldier, trapped out of his time, who unwittingly holds the key to saving the world. With an old hospital haunted by ghosts from 1918, a crisis forseen by Torchwood 90 years ago is about to reach its climax. Time zomes are colliding and with life-and-death decisions to be made, will Torchwood be able to stop an explosive end for Cardiff? (Prime Video)