Question: when does sara come back from the dead

Answer: Yes, In season four, Laurel resurrects Sara using the League's mystical Lazarus Pit. The process is successful, but Sara is brought back to life without a soul, making her feral and dangerous. Oliver calls his old friend John Constantine to assist them in restoring Sara's soul. Days later, Sara aids in rescuing Ray Palmer/The Atom from the hands of Damien Darhk, before leaving town to find herself, eventually joining the Legends along with Ray. During her time away with the Legends, Laurel is killed by Darhk and she is later made aware of it by Quentin when she briefly returns to present-day Star City at the end of season one of Legends of Tomorrow, where she and Quentin mourn her together.