Oliver's lawyer is said to be named "Jean Loring". In the comics, Jean Loring was Ray "The Atom" Palmer's girlfriend, then wife, then ex-wife.
This episode is Arrow's second lowest rating ever in the series, only slightly better than S6E07 Thanksgiving (2017), which aired on Thanksgiving. It had a 0.4 with 1.30 million viewers. It is also as of Dec 2017 the 8th lowest rated episode of Arrow, and the lowest rated episode since S4E23 Schism (2016) on IMDb.
A storyline thread of the episode is Oliver and Felicity's friends and family celebrating their marriage, since they didn't have a traditional wedding ceremony. Ironically, "irreconcilable differences" is a commonly-cited grounds for divorce.
Kirk Acevedo and Michael Emerson previously co-starred in the same episode of Person of Interest (2011), which is titled Mors Praematura (2013).