Two's Company is a lot more ambitious than A Genius for War or Past Lives, actually attempting to tell a bit of a story. Sadly, it's one that just doesn't click for me by any metric. Jackie Tyler and Lady Christina meeting is charming enough, but neither of them have any sort of actual connection with The Sixth Doctor, and none is really forged. The villain is The Two, a member of the Collective Time Lord who appears in other Big Finish releases as The Eleven, the Nine and the Twelve. Suffice to say he isn't as interesting as his counterparts, though I applaud that he is still an evil man regardless of how many personalities are in his head.

I just don't get what they were thinking here.

I'd seen a lot of unfavourable comments regarding this Once And Future story, but honestly I thought it was better than its reputation suggests. Although there are some pacing issues, and the story is rather basic, Jackie Tyler and Lady Christina make a heck of a fun pair. It's interesting hearing Jackie with a Doctor like the Sixth, who is so different from either the Ninth or Tenth Doctors. The Sixth Doctor is also unafraid of calling Harry Sullivan an imbecile like his predecessor!

This was fun.
I'm not a big fan of Jackie Tyler and Lady Christina, but they are really funny here. Jackie was the main source of comedy here.
Colin Baker's Sixth Doctor is amazing as always. Christopher Naylor nails the late great Ian Marter's Harry Sullivan perfectly (although I don't like him being aged on the cover). Their chemistry is amazing, I even laughed one time:
The Doctor (in the form of his Third incarnation): Harry, old chap, it's so good to see you! *retro-regenerates into Sixth* HARRY SULLIVAN YOU OLD FOOL YOU'VE SET MY CONSOLE ON FIRE!!!!
I was thinking this story would be generic, but Michael Maloney's the Two mostly saved it for me. I heard only one audio with the Eleven, and it is interesting to see how this villain began his life. But I wish he had a lot more time to get explored in this story - without it his storyline feels rushed and unfinished.
I can't say this story wasn't fun. It was quite enjoyable.