The song playing during the end credits is "He's a Demon, He's a Devil, He's a Doll" recorded by Betty Hutton in 1950. The song is broadcast on Diamond City Radio in Fallout 4 (2015), and is on the official Amazon Music playlist "Music from Fallout." Betty's 1951 song "It's a Man" can also be heard on Diamond City Radio in Fallout 4 (2015), and plays during the scene where Maximus first tries on the suit of T-60 power armor in The Target (2024).
The theme music from Fallout 4 (2015) plays when Lucy first approaches the NCR Rangers' weapons cache. The cache contained several weapons from the game, including a short-barreled lever action rifle with a sawed off butt-stock known as a Mare's leg (similar to The Ghoul's rifle), and a radium rifle. Both of these rifles were introduced in Fallout 4: Far Harbor (2016) and subsequently appeared in Fallout 76 (2018).
The song playing during the Support Group scene is "Rum & Coca Cola" by The Andrews Sisters. This particular song was never featured in any of the Fallout games, however several of their other songs are. "Civilization", also known as "Bingo, Bango, Bongo", performed along with Danny Kaye in 1947, plays on Galaxy News Radio in Fallout 3 (2008), Diamond City Radio in Fallout 4 (2015) and Appalachia Radio in Fallout 76 (2018). "Pistol Packin' Mama", performed along with Bing Crosby in 1943, appears in Fallout 4, Fallout Shelter (2015) and Fallout 76. Their 1944 cover of "Straighten Up and Fly Right", written in 1943 by Nat 'King' Cole, plays on Appalachia Radio in Fallout 76 and appears in the trailer for the Power Armor Edition of the game. Their cover of "Don't Fence Me In" performed with Bing Crosby, and written by Cole Porter in 1944, appears in Fallout 76 and The Target (2024). Their 1949 cover, performed with Gordon Jenkins, of "I Can Dream, Can't I?", written in 1937 by Sammy Fain and Irving Kahal, appeared in The Ghouls (2024).
