When you hear
a songbird's WHISTLE, you come.
Game of Thrones Season 3, Episode 9
I'll be blowing the WHISTLE.
The Big Bang Theory Season 10, Episode 15
- Can I WHISTLE?
- Don't be silly.
The Big Bang Theory Season 2, Episode 13
( train WHISTLE blows )
Westworld Season 2, Episode 6
Is it a high-frequency WHISTLE?
The Big Bang Theory Season 2, Episode 10