Lives are at risk as Clarke (Eliza Taylor) and Lexa (guest star Alycia Debnam Carey) encounter a new emeny. Bellamy (Bob Morley) and Lincoln (Ricky Whittle) agree to work together to break into Mount Weather. Murphy (guest star Richard Harmon) helps Jaha (Isaiah Washington) confront his past. Meanwhile, Indra (guest star Adina Porter) makes Octavia (Marie Avgeropoulos) an offer she can't refuse.