Star Trek Lower Decks: Every Easter Egg & Hidden Reference From 'Second Contact'

At the start of "Second Contact" we meet Ensign Boimler and Ensign Mariner, lugging around a hovering cart that she later refers to as her "big box of shore leave contraband".

Like the character herself, Mariner's big box is full of references to Trek's past... there's a bottle of Saurian brandy which first appeared in the Star Trek: The Original Series episode "The Enemy Within" and went on to appear in countless future episodes and movies, up to its latest appearance in Star Trek: Picard's "The End is the Beginning". There's also a Glavin sticking out of the box, one of those spiked-ball-gloves from TNG's regrettable "Code of Honor".

This scene also features Mariner chugging from a round bottle of Romulan whiskey, which she notes is blue (like Romulan ale) and not green (like everything else about Romulan aesthetics).

The major focus of the scene, though, is the rusty, bloody bat’leth (the TNG style, not the redesigned Star Trek: Discovery or Star Trek: Picard versions). Mariner swings it at Boimler, saying she got the bat'leth from an "old guy with an eyepatch", which could be a reference to General-turned-Chancellor Martok from Star Trek: Deep Space Nine, but eyepatches aren't uncommon amongst Klingons, so...

Mariner's drunken Klingon rant refers to the warrior race's "wrinkled foreheads" and "crimped hair" (finally someone calling out the Klingons for their very 1980s dos) and is punctuated by her just shouting Worf's name repeatedly.