It's all AU.

John had spent a fun couple of hours with the Master, trying to investigate the bar droid further, then finally putting the damn thing back together. They hadn't found out anything more, but the time spent playing with electrics with a like-minded enthusiast had settled him. A lot. And the droid still worked. Which was. A bonus.

In fact, he was feeling so much more relaxed, he'd gone back out to the lake when they were done. Walking around the lake a bit from his usual haunt on the beach, he'd  found a sheltered area where a stream joined the lake.  He'd set up a kind of makeshift swing rope over the water, hung from a tree whose branches overlooked the lake, and was currently tugging hard on the rope to test it's strength before using it.

He saw a figure vaguely at the periphery of his vision, some way back from him, and called out to them, "Care for a swim?"

The Master was digging a hole beside his counterpart's original one. It was surprisingly satisfying. He was feeling a lot better already.

Though still disappointed in himself - and anxious because of that.