Rimmer has Delayed Sleep Phase
Syndrome, which is why he is so bizarre about his sleeping pattern,
and far more active during night time. He can’t get to sleep
before 2 or 3 in the morning no matter how hard he tries, but his
father’s drilling has taught him to force himself to get up at 6. The
constant lack of sleep is one of the reasons he is always tense,
tired and grumpy. When Rimmer returns as a hologram Lister and
Holly find more and more ingenious ways for Rimmer to actually get
some sleep. Holly “forgetting” to wake him is a favourite. Over
the years Lister patiently convinces him he is allowed to sleep as
long as, and whenever he wants to. This is why the Rimmer we see today simply gets up when Lister does or casually potters about in his dressing gown late in the afternoon.
aceofsquiddles 