Needfire episode centers on Ellen and Brian's Beltane union

Episode five of the Outlander prequel Blood of My Blood, titled Needfire, centers on a single, combustible Beltane celebration that dramatically reshapes several characters’ trajectories. The episode, which aired Friday, Aug. 29 and is available on the Starz app and the Starz network, stages a May festival at Craigh na Dun where forbidden longing, secret vows and clan politics collide.

Set against the ritual bonfires and stone circles of a traditional Beltane, Needfire follows Ellen MacKenzie and Brian Fraser as they seize a brief, illicit chance to declare and consummate their love. The two perform a handfasting ceremony and have sex in a ruined building, a turning point the actors say is irreversible. Harriet Slater, who plays Ellen, recalled the difficulty and weight of delivering the line “Ruin me,” calling it a pivotal moment for the character. Jamie Roy, who plays Brian, described the scene as a promise that cannot be taken back and said the character wrestles between honor and desire.

The festival sequence also forces other tensions into the open. Murtagh Fitzgibbons, who has long pined for Ellen, spies on Brian and Ellen and discovers their betrayal. Rory Alexander, who...