Gibbs's address is shown as "500 Block East Laurel St, Alexandria, VA" The address does not exist so Google Maps returns Laurel Rd, Alexandria, VA. Laurel Road ends at Gibbs Street.
Joshua Rexon had been credited as a co-producer in previous episodes. He is now credited as a producer.
When the team first arrives in West Virginia, Palmer says, "Spectacular. Are those the Blue Ridge Mountains?" Gibbs replies, "Shenandoah River's not far." Ducky then says, "thank God, I'm a country 'lad'," to which Tony corrects him, saying, "country BOY, Ducky." Their dialog is a direct reference to two songs, both of which were recorded by the late singer/songwriter John Denver. The most obvious one--in which the title is directly referenced--is the song entitled, "Thank God, I'm A Country Boy." Written by John Martin Sommers, and recorded by Denver, it was first released on his 1974 album, "Back Home Again." However, the most popular recording of the song is from the live album, "An Evening With John Denver," released in 1975. The second song, and the one likely familiar to most people--especially after the release of the 2017 film, "Kingsman: The Golden Circle"--is the song entitled, "Take Me Home, Country Roads." Written by Bill Danoff, Taffy Nivert, and John Denver, and released on Denver's 1971 album, "Poems, Prayers & Promises," the opening lyrics of the song--almost in direct order of the dialog spoken by the team--are as follows: "Almost heaven, West Virginia; Blue Ridge Mountains, Shenandoah River." And, the familiar chorus (though never spoken by the team): "Country roads, take me home to the place I belong! West Virginia, mountain mama; take me home, country roads."
Toward the very end a song can be heard in the background. Then it can be clearly heard. The song is "If I Go" by Greg Laswell. Its vocals and melody sound very similar to Snow Patrols "The Lightning Strike."