Have you ever known a plan of escape to succeed which involved Number 6? In ‘Checkmate’ Number 8 asked Number 6 when he was going to try and escape, as everyone tries to escape when their spirit's broken. If it's a good plan, Number 8 told him that she'd help him with it, seeing as how she'd helped others with their plans. But then their plans never succeeded, which I suppose would be something of a coincidence. But then again, Number 6 may have had his doubts about Number 8, but his own record regarding escape plans is hardly flawless. Talk about Number 8! Have you known a plan to succeed which involved No.6?
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