Clark must protect Lex from a deadly, invisible force; Lana looks to Clark for companionship after Whitney pushes her away.
When FBI Agent Jack Willis and bank robber Warren Dupre are both shot at the same time during a robbery attempt, Dupre dies and Willis is brought back to life.
On the anniversary of Jon's death, everyone reflects on how much their lives have changed; Eddie's dream opens up a new mystery.
Lana experiments with a dangerous serum that allows her to flatline and see her deceased parents again.
When Henry is invited as a guest speaker at a luxury resort spa, he quickly finds himself at the center of another murder.