Artie arrests Kevin Munroe's temperature decline by applying artifact eye-glasses of the inventor of the electric thermostat. Instead of saying "Albert Butz." who indeed invented and patented the electric thermostat, Artie mistakenly says "Alfred Butts" who invented the board game Scrabble.
When Leena discovers Claudia about to be drowned by the water artifact in the warehouse, it sounds as if she calls out "Myka! Myka!" instead of "Claudia! Claudia!" but in fact she calls out "Oh, my God! Oh, my God!"
During two closeup shots of Nielsen on the viewscreen when Pete and Myka are talking to him from the hospital, the zombie's hand on the hospital bed in the background is missing the bluish-gray zombie makeup.
When showing Kevin Munroe to Artie over the Farnsworth, Artie comments on Munroe's "necrotic dermal discoloration." However since the Farnsworth feed is in black and white, noticing such discoloration would be impossible over a Farnsworth call.
Claudia's text message misspells Steve's nickname, Jinksy, as 'Jinsky'.
Since Claudia obviously only knows a few chords, she could not have been able to play the songs listed by Dwayne. Dwayne actually can't play guitar at all. He was faking, badly.