I thought the first one was perfectly in character for Rimmer, I mean he had, in his eyes, just been rejected for "Captain Bog Bot" and then rejected again for the possibility to bring another hologram onboard, so I could believe that level of vindictiveness coming from him given the circumstances.
And running and hiding from danger is his default position, so in the case of Terrorform I find that very believable for him.
Out of character is the "better dead than smeg" moment from the end of series 6.
Well, we'll just have to agree to disagree that i'm wrong on the first one.
As far as blowing up the time drive goes, I saw that as the culmination of the character growth they had been giving him over the previous 6 series. Not out of the realm of possibility that when the crunch came he would come through for them.
Being smart enough to figure it out, now THAT was out of character
