Clarke (Eliza Taylor) begins to question Lexa’s (guest star Alycia Debnam Carey) leadership decisions.
Malcolm (John Barrowman) puts Oliver (Stephen Amell) and Thea (Willa Holland) in a dangerous situation that lands them on Lian Yu with Oliver’s former enemy, Deathstroke (guest star Manu Bennett).
Dean (Jensen Ackles), Sam (Jared Padalecki) and Castiel (Misha Collins) deal with Cain’s (guest star Timothy Omundson) return.
After the nuclear explosion separates Ronnie (guest star Robbie Amell) and Dr. Stein (guest star Victor Garber), Barry (Grant Gustin) and the team believe both men are safe.
Michael (Brett Dier) is convinced that Rafael (Justin Baldoni) is helping to hide his father and puts the thought into Jane’s (Gina Rodriguez) head as well, making her grow suspicious of Rafael’s recent actions.
As Mary (Adelaide Kane) and Francis (Toby Regbo) investigate who was behind the poisoning of King Henry (Alan Van Sprang), they unearth secrets of the past which force Mary to confront her feelings for Condé (Sean Teale) as she attempts to move forward.
It’s Jeremy’s (Steven R. McQueen) last day in Mystic Falls and Elena (Nina Dobrev) puts on a brave face as they reminisce about their past.
Tensions between Clarke (Eliza Taylor) and Abby (Paige Turco) come to a head after Clarke crosses the line.
Oliver (Stephen Amell) is thrown by the changes within Team Arrow.
ghost starts killing people through various electronic devices.