
...the dark matter SIGNAL found
in sodium-iodide crystals by the Italians.
The Big Bang Theory Season 2, Episode 15

I'm doing some experiments
to show that the SIGNAL to move a muscle
The Big Bang Theory Season 10, Episode 19

The vests are detecting
a strong SIGNAL amassing
on the lower levels.
Westworld Season 2, Episode 7

to give you the SIGNAL
to light the trench.
Game of Thrones Season 8, Episode 2

And we can just send up
a SIGNAL flare.
Breaking Bad Season 2, Episode 9