During a flashback scene between Oliver and Laurel, the song "Bleeding Love" by Leona Lewis is playing in the background. Songwriter Jesse McCartney wrote this song about Katie Cassidy, the actress who portrays Laurel Lance.
On the Season 1 DVD, the deleted scenes for this episode include a shot of young Thea's bedroom door with a sign revealing her full name as "Thea Dearden Queen". In the comics, Mia Dearden is the name of the second character to take the mantle of Green Arrow's sidekick Speedy.
Moira Queen mentions a "Ted Kord fund-raiser". Ted Kord is the second incarnation of the Blue Beetle in the DC Universe, in which Green Arrow also exists.
The password Felicity Smoak (Emily Bett Rickards) has to give before being allowed entry to Dominic Alonzo's (Ray Galletti) illegal card game in The Undertaking (2013) is "snapdragon". The Snapdragon is a flower whose shape resembles an arrow.
Malcolm Merlyn references something called "the Markov device". In the DC comics Brion Markov is the prince of the fictional country of Markovia, and the superhero known as Geo-Force, whose powers give him control over Earth forces like gravity and volcanic activity.