When collectors of Native American artifacts are attacked by a meta named Mina Chayton who can bring inanimate objects to life, Barry turns to a surprising ally for help. Determined to crack the identity of The Thinker, Harry enlists Cisco's help to summon the ultimate think tank; "The Council of Wells", a roundtable of the brightest Harrison Wells’ from various Earths.
- The title of the episode is a reference to the 1989 film When Harry Met Sally...
- When Harry was talking to his doppelgängers, a doppelgänger of him interrupted and said, "It is I! Wells the Grey!", a reference to Gandalf from the Lord of the Rings.
- Discussing his attributes in reference to his doppelgängers, Cisco tells Harry that sometimes "you're a wizard, Harry". This is a play on the line spoken by Rubeus Hagrid to Harry Potter in the 1997 novel Harry Potter and the Philosopher's Stone and its 2001 film adaptation, and also a reference to the previous bullet-point.
- When Barry tells Ralph to suit up, the latter mocks it as the opposite of a "rousing Braveheart speech", referencing the infamous speech given by William Wallace in the 1995 film Braveheart.
- When the Tyrannosaurus rex bones shake Ralph about, he cries "for the love of Jeff Goldblum", referencing the actor in the Jurassic Park franchise.
- When the Tyrannosaurus rex came to life in the museum, it references the movie Night In The Museum when the museum exhibits came to life overnight.
- While in S.T.A.R. Labs, Ralph is reading The Young All-Stars #20.
- Unlike the first three seasons, this episode has Team Flash identifying the main antagonist early on the season rather than near the end of the season.
- Cisco refers the group of Wells as Council of Wells. Other scientists from different sci-fi products have created similar councils of their alternate universe counterparts, such as the Council of Reeds from Marvel Comics, or the Council of Ricks from the TV series Rick and Morty.
- When Iris West mentions that Chaytan escaped from CCPD.- Apparently, she made a tactical dummy go full "Terminator" at the station. Iris West is talking about the Terminator movies series, in which a robot from the future tries to kill certain people to ensure of the future that they want.
|The Flash season 4|
|"The Flash Reborn" • "Mixed Signals" • "Luck Be a Lady" • "Elongated Journey Into Night" • "Girls Night Out" • "When Harry Met Harry..." • "Therefore I Am" • "Crisis on Earth-X, Part 3" • "Don't Run" • "The Trial of The Flash" • "The Elongated Knight Rises" • "Honey, I Shrunk Team Flash" • "True Colors" • "Subject 9" • "Enter Flashtime" • "Run, Iris, Run"|
|"Null and Annoyed" • "Lose Yourself" • "Fury Rogue" • "Therefore She Is" • TBA • TBA • TBA|