This episode marks the first appearance of the Tellarites and the Andorians in Star Trek: Discovery (2017). Both species made multiple appearances in Star Trek (1966) and Star Trek: Enterprise (2001).
This episode has the longest teaser in "Star Trek" history at fourteen minutes and six seconds.
This episode takes place in 2257.
The mats that Burnam and Tyler are standing on when they transport back up to the USS Shenzhou are standard black rubber mats used in bars and restaurants.