Their IDENTITY is yet unknown.
Money Heist Season 1, Episode 12
They've confirmed their IDENTITY, Colonel.
Money Heist Season 3, Episode 7
But you're okay with Superman
concealing his IDENTITY with glasses?
The Big Bang Theory Season 8, Episode 6
...suffer from an external locus
of IDENTITY.
The Big Bang Theory Season 2, Episode 15
A captive knight has
a right to know his captor's IDENTITY.
Game of Thrones Season 2, Episode 8