The Shadow was seeking to beat the brain that dealt in murder.

The Shadow, on the contrary, is seeking to prevent death.

The Shadow and his agent, independently, would seek the information that was needed.

The Shadow sought some hidden catch by which to open it.

These were questions for which The Shadow sought an answer.

That was the question which The Shadow sought to answer.

That was the question for which The Shadow sought an answer.

He opened a door, the very one that The Shadow sought.

The Shadow sought to beat him to the shot.

The Shadow was seeking a trail which he believed would bring him to a scene of recent crime.