Scorpion to The Flash
4 connections
Scorpion
NCIS: LA
Hetty Lange from NCIS: LA helped out the investigators from Scorpion on a case
Hawaii Five-O (2010)
NCIS: LA and Hawaii Five-O worked together in a crossover episode to stop a smallpox outbreak
Arrow
Hawaii Five-O references Dominic Alonzo from Arrow
The Flash
Arrow spun off The Flash