Greatest Flash Episode

With season 5 of the Flash now at a close I thought it would make for an interesting topic to see which episode you all think stands above all the rest as the single greatest one.

Have put a list of what I think are the favorites any others you think should be up for consideration just let me know

Flash Season 1
Flash S1 Ep1: Pilot
Flash S1 Ep4: Going Rogue
Flash S1 Ep8: Flash vs. Arrow
Flash S1 Ep9: The Man in The Yellow Suit
Flash S1 Ep15: Out Of Time
Flash S1 Ep17: The Tricksters
Flash S1 Ep22: Rogue Air
Flash S1 Ep23: Fast Enough

Flash Season 2
Flash S2 Ep1: The Man Who Saved Central City
Flash S2 Ep2: The Flash of Two Worlds
Flash S2 Ep6: Enter Zoom
Flash S2 Ep8: Legends Of Today
Flash S2 Ep11: The Reverse-Flash Returns
Flash S2 Ep13: Welcome To Earth-2
Flash S2 Ep14: Escape From Earth-2
Flash S2 Ep15: King Shark
Flash S2 Ep20: The Runaway Dinosaur
Flash S2 Ep23: The Race of His Life

Flash Season 3
Flash S3 Ep1: Flashpoint
Flash S3 Ep2: Paradox
Flash S3 Ep8: Invasion
Flash S3 Ep13: Attack On Gorilla City
Flash S3 Ep14: Attack On Central City
Flash S3 Ep15: Wrath Of Savitar
Flash S3 Ep16: Into The Speedforce
Flash S3 Ep17: Duet
Flash S3 Ep20: I Know Who You Are
Flash S3 Ep22: Infanito Street
Flash S3 Ep23: Finish Line

Flash Season 4
Flash S4 Ep1: The Flash Reborn
Flash S4 Ep4: Elongated Journey Into The Night
Flash S4 Ep7: Therefore I Am
Flash S4 Ep8: Crisis On Earth-X Part 3
Flash S4 Ep9: Don't Run
Flash S4 Ep10: The Trial Of The Flash
Flash S4 Ep15: Enter Flashtime
Flash S4 Ep22: Think Fast

Flash Season 5
Flash S5 Ep8: What's Past Is Prologue
Flash S5 Ep9: Elseworlds
Flash S5 Ep15: King Shark vs. Gorilla Grodd
Flash S5 Ep18: Godspeed
Flash S5 Ep22: Legacy


What's your overall favorite episode & what's your favorite for each season?