Ep 4. Many Happy Returns

After discovering that a signal has been transmitting from Earth, members of the Ark decide to investigate. Clarke and Anya find themselves in a dangerous situation while on their way to the source of the signal, and they must work together to find a way out. Meanwhile, back on the Ark, Chancellor Jaha receives a surprise visit from someone he never expected to see again. As tensions rise among the command council, Abby must navigate a difficult decision that could have serious consequences for the safety of everyone on board. Bellamy and Octavia set out on a mission to find Lincoln, but their journey takes a surprising turn when they encounter a group of Grounders who are not what they seem. As the members of the 100 continue to face challenges both on Earth and in space, they must work together to ensure their survival in this new, dangerous world.