In full plate METAL for 16 hours.
Game of Thrones Season 3, Episode 5
If the answer is METAL,
it's not exactly groundbreaking.
The Big Bang Theory Season 6, Episode 3
Hey, who found four dollars and change
on the beach with his METAL detector?
The Big Bang Theory Season 9, Episode 20
Sink your METAL deep
Game of Thrones Season 3, Episode 6
to a giant METAL door.
The Big Bang Theory Season 12, Episode 12