This article is from the Red Dwarf FAQ, by Patrick M. Berry pat@interpath.com with numerous contributions by others.
Most of the reversed dialogue in the episode "Backwards" is pretty much
either what the subtitles say it is or what you'd expect from context; some
of it actually appears to be random noise. There are two notable
exceptions, however.
When Lister and the Cat steal a bicycle, its owner yells after them, "You
scoundrels! Return my bike immediately!" -- at least, according to the
subtitles. What he actually says, however, is, "Oi! Hey! Oi, you robbing
bastards, that's our tandem!"
Later, when the stage manager comes in to yell at Rimmer and Kryten, he
appears to be blaming them for starting the fight. Here's what he actually
says:
You are a stupid, square-headed, bald git, aren't you? Eh? I'm
pointing at you, I'm pointing at you. But I'm not actually
addressing you. I'm addressing the one prat in the country who's
bothered to get hold of this recording, turn it round, and
actually work out the rubbish that I'm saying. What a poor, sad
life he's got! . . . Frankly, your act's crap. Anyway, anybody
could have done it. I hate the lot of you. Bollocks to you!
 
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