Knock, Knock

{Season 2}}

"Knock, Knock" is the second episode of the second season of Gotham. It is set to air on September 28, 2015.

Synopsis
On the heels of his reinstatement, Gordon is thrust onto the high-profile case tracking the deadly inmate escape from Arkham Asylum. Meanwhile, Galavan plans his next move, while Bruce asks for help from his father’s old friend to unlock the secrets in his office, and Nygma asks out Kristen Kringle on a date.