Each of the main characters has a double identity.

What we have here is, in fact, almost a case of double identity.

To be a major collector of both paintings and drawings is almost to have a double identity.

That way I could come and go and no one would suspect my double identity.

In a moment he overlapped him and felt the confusion of double identity.

This double identity is new to most of the women.

It is exactly what we should expect to happen, granted the double identity.

To preserve his double identity, he had to account for Cranston's absence.

Joe Cardona no longer doubted the truth of the double identity.

"I believe that Estelle has already disclosed my double identity."