Three million years into the future, Arnold Rimmer attempted to mess around with the timeline through the use of timeslides to give himself a break. His initial goal (that he never joined Red Dwarf) was unsuccessful, but as he bemoaned his bad luck, Holly realised an unexpected consequence was that Rimmer was no longer a hologram who died in the radiation leak, but was once again human, alive and whole.
Elated, Rimmer took a bite from Hitler's banana sandwich, and called for Kryten to unpack Rachael and get out the puncture repair kit. The others didn't hear Rimmer's cries of joy as they walked off down a corridor in the cargo bays. Rimmer followed them, fondling supply crates and thumping them. Rimmer eventually brought his fists down on two crates marked "explosives", which immediately blew Rimmer to smithereens. The others dismissed the bang, and whatever Rimmer had been shouting about, and continued walking. (Timeslides, Series III)
The next episode, Rimmer was once again a hologram.
A few years later, two copies of Red Dwarf were formed by the Triplicator. Entering the cargo bays of the Low Red Dwarf, the Boys from the Dwarf and the Highs came under bazookoid fire. High Kryten and High Cat were shot numerous times, exclaiming that it must have been an accident, and that they loved their attackers. The Lows then threw some makeshift grenades that they had crafted from the mining explosives. High Kryten and High Cat believed it to be a "sparkling welcome orb", admiring it as the others ran away. It exploded, killing the highs. (Demons & Angels, Series V)