On a flight for a security job, Vanessa tells a flight attendant that she and Kevin are newly married in order to get bumped up to first class, but her fib creates a lot of extra baggage when Kevin meets Lisa and the two hit it off.
When an ecstasy cook-turned-chemistry-teacher is found murdered in a cozy Los Angeles suburb, Lucifer and Pierce must go undercover to help track down the killer. Meanwhile, Maze has a newfound attraction for someone that she used to despise and Charlotte has a revelation.
Team Scorpion must prevent an incoming tsunami from hitting a vulnerable nuclear power facility, and Toby secretly helps his ex-fiancée retrieve her stolen identity.
Someone tries to kill Morgan Edge and he barely survives. He accuses Lena of being behind the attempt and vows to destroy her. When Lena fears her hatred for Morgan will take her to the Luthor dark side, Kara steps in to help her friend. Meanwhile, after Sam realizes she’s losing time, she confides in Alex who decides to run some medical tests to see if she can find out what’s going on with her new friend.
Sara finds a clue and Kreizler tries to connect the evidence left behind by the serial killer. Kreizler takes Moore, Sara, Marcus and Lucius to Delmonico's in New York and informs them they're working together to catch the killer.
Chelsea receives the first one-on-one date in Ft. Lauderdale. Arie swoops in to take her on a 100-foot luxury yacht, but her checkered past may endanger her getting a rose. Eleven women split into teams for a day of competitive bowling with the winner going to a private after-party. Tia and Arie travel to the Sawtooth Park Reserve, riding an air boat through the Florida swamps, but then she reveals her daunting past, which might spell the end for this happy couple.