In the final interview, the candidate meets with 3 to 4 of us on the team and we talk for about an hour. Our team comes in with a set of prepared questions which address past work experience, company culture, team practices and relationships. We make sure it's the same group of interviewers for a given position and we don't robotically stick to the script but try to cover the same ground with each candidate so we're making fair comparative evaluations.

Also, I suspect our job description and pre-interview process (requesting a cover letter, asking a couple short-answer questions in a personal message as soon as we receive an application) succeed in filtering out candidates who aren't thinking about a job as a social inter-personal commitment.