The Old Man and the Key/DVD features

"The Old Man and the Key" is included on the The Complete Thirteenth Season.

Commentary
DVD commentary is included on The Complete Thirteenth Season boxset with comments by Al Jean, Matt Selman, Carolyn Omine, Tom Gammill, Max Pross, and Matt Warburton.

Deleted scenes
Deleted scenes are included on The Complete Thirteenth Season boxset.