Lisa states to Joe "You are the Unabomber, aren't you?" The Unabomber had been apprehended just 18 days prior to this episode airing after a massive amount of national media attention and a 17 year span of attacks.
This episode title references the Led Zeppelin album "Coda" (1982), a rarities compilation album that is a collection of unused tracks from various sessions during their 12-year career.
Musically, a "coda" is the concluding passage of a piece or movement, typically forming an addition to the basic structure. It can also refer to the concluding section of a dance, especially the finale of a ballet in which the dancers parade before the audience. Generally, coda can refer to a concluding event, remark, or section, e.g., "her painting is a coda to her previous works." [paraphrased from Wikipedia] [02.03.2020]