Um, if a certain
dog-like loyalty is USEFUL,
The Big Bang Theory Season 11, Episode 12
Useful talent.
Game of Thrones Season 5, Episode 7
And if he's USEFUL,
good. If not, throw him off the Wall.
Game of Thrones Season 3, Episode 3
You might find a bit of armor quite USEFUL
Game of Thrones Season 3, Episode 1
I find him very USEFUL,
as you will discover.
Vikings Season 1, Episode 3