- Actor Allusion: Some prop phone message detail messages from D. Noble (information regarding a library), Martha Jones ("has information regarding Sally Sparrow"), R. Tyler ("Something regarding a wolf?") It's all a reference to both David Tennant's and head writer Chris Chibnall's association with BBC series Doctor Who.
- California Doubling: Inverted. While set in California, the show was shot in Canada.
- Fake American: Scottish David Tennant and Australian Jacki Weaver.
- Role Reprise: David Tennant still plays the main detective, though under a different name.
Trivia / Gracepoint