The White Rabbit, the episode title, may be a thinly-veiled reference to the tale "Alice in Wonderland" by Lewis Carroll. In it, Alice chases the White Rabbit down the Rabbit Hole. The White Rabbit in the case of this installment, may be a metaphor, as in a conduit to a new world of possibilities.
In the flashback where Karl D'Branin (Eoin Macken) is talking to Agatha Matheson (Gretchen Mol), he tells her he sold his motorcycle. In The Night Shift (2014-2017), Macken's character TC Callahan also drove a motorcycle.