While battling the Crystal of M3X-387, Carter makes a possible reference to Reimer's death when Doctor Jennifer Keller says they can't artificially keep Doctor Rodney McKay awake for long without risking pulmonary failure. This causes Carter to comment that "believe it or not, I've been there before too." Presumably this is a reference to Reimer's heart attack from all of the stimulants he took. (SGA: "Doppleganger")