Star Trek Discovery: Every Easter Egg & Hidden Reference From 'People Of Earth'

"People of Earth" marks the first time we've seen just how large a supply of dilithium crystals is carried by Federation ships of the 23rd century.

Michael gives Book a container of dilithium from a large honeycomb stock, dispensed by a robotic arm.

Previous appearances of dilithium aboard starships has generally been depicted as residing solely in the reaction chamber like in Star Trek: The Original Series' "Elaan of Troyius" or in a re-amplifying unit like in "The Alternative Factor".