Arrowairs Mondays at 8 p.m. on The CW.

Plus, it introduces one of the shows most iconic visuals: the salmon ladder.

Written by Jake Coburn and Ben Sokolowski, this is one of the show’s most suspenseful hours.

Arrow

Credit: Katie Yu/The CW

That entire fight remains one of the show’s best setpieces.

The episode seamlessly juggles great action beats (that chase scene!)

Who saidArrowdoesn’t know how to have fun?

Pilot

Jack Rowand /The CW

“Invasion!”

Penned by Brian Ford Sullivan and Emilio Ortega Aldrich, this risky episode is devastatingly brutal but worth it.

It had the weight of a series finale.

Vendetta

Diyah Pera/The CW

The Odyssey

Jack Rowand /The CW

Sacrifice

Jack Rowand /The CW

League of Assassins

Michael Courtney /The CW

The Scientist

Cate Cameron/The CW

The Promise

Cate Cameron/The CW

Unthinkable

Cate Cameron/The CW

The Climb

Cate Cameron/The CW

Uprising

Katie Yu/The CW

Public Enemy

Cate Cameron/The CW

Beacon of Hope

Dean Buscher/The CW

Invasion!

Bettina Strauss/The CW

Kapiushon

Jack Rowand/The CW

Lian Yu

Dean Buscher /The CW

Brothers in Arms

Jack Rowand/The CW