An ominous help note finds its way to a 1980s post office, connecting a dead letter investigator to a kidnapped keyboard technician.
| Actor | Role |
|---|---|
 Sterling Macer Jr.Josh | Josh |
 John FleckTrent | Trent |
 Tomas BoykinJasper | Jasper |
 Micki JacksonAnn | Ann |
 Susan PriverBess | Bess |
 Sean HeymanBrooks | Brooks |
 Nick HeymanRenée | Renée |
 Micah FitzgeraldKnut | Knut |
| SShelby SulakAllison | Allison |
 Aaron PhiferVincent | Vincent |
| KKeyon McConaghyDarrell | Darrell |
 Joseph LopezSplinter Man | Splinter Man |
| SSharieff WaltersKirby | Kirby |
| JJackie GreenHideki | Hideki |
 Alyssa BrayboyMayumi | Mayumi |
 David WillisSherm | Sherm |
 Josh HarpBlake | Blake |
| MMichael CambridgeBakir | Bakir |
| SShelby SheaPost office patron | Post office patron |
| RRobin D. StantonSynthesizer Representative | Synthesizer Representative |
 Michael J. GwynnPost office patron | Post office patron |
 Jackie GreenHideki | Hideki |