At MI6's underground headquarters, Q attempts to decrypt Silva's laptop, but inadvertently enables it to access the MI6 systems, allowing Silva to escape from MI6 custody. Bond realises that Silva wanted to be captured as part of a plan to confront and kill M, whom he resents for leaving him to die after being captured years earlier. Bond gives chase through the tunnel network under London. Silva attacks M during a public inquiry into her handling of the stolen hard drive. Bond arrives in time to join Mallory and Eve in repelling Silva's attack, and M is hurried from the building by her aide, Bill Tanner. Bond drives M to Skyfall, his family estate and childhood home in Scotland. Laying a trap, he instructs Q to leave an electronic trail for Silva to follow, a decision Mallory supports.