This is just some thought I had while watching an early episode. Hope you enjoy!

Time to go...

'Sherlock, come on, you need to pack some clothes or else you'll be walking around London naked!'

'Watson be rational, you know I would happily walk around London with no clothes on but unfortunately the law abides me not to do so'

Joan walked into Sherlocks bedroom to see him lying flat on his neatly made bed, his suitcase was open empty on the floor and clothes were thrown anywhere but inside it. Joan knew that he was not looking forward to the trip to London for one reason and was worried that reason was affecting him badly. Ever since they both heard of Moriartys escape Sherlock had been acting strange. Stranger than normal.

Knowing their flight was in less than 24 hours Joan set to work on packing Sherlocks discarded clothes.

'Sherlock, I've packed your shirts and bottoms and socks but I refuse to mess with your underwear so can you please pack enough for 2 weeks.'

Joan saw no movement in the detective so decided to pull on his heart strings a little.

'Sherlock I'm worried about you, you've been acting really differently, so just know that I'm always here if you need to talk'

And with that Joan left the room, half way down the stairs she heard a reluctant Sherlock move.

Something was definitely off with him, maybe he was worried, maybe he was just being his usual lazy self. Sherlock only abided by his own rules so being told to go to London and find his old girlfriend (who also faked her death and happened to be a murderer) was abit of a culture shock.

'This isn't going to be fun' Joan thought.

3 cups of tea and a kitchen cleanup later, it was time to set off for their flight. Sherlock hadn't moved since he bought his case down and went back to 'think'. With his recent behaviour being so unusual Joan plucked up the courage to ask him what was wrong.

Taking a deep breath she walked into his room, Sherlock was lying on his bed staring at the ceiling, he didn't even move when Joan walked in.

'Sherlock we need to talk...'

No movement.

'...You've been acting so strangely and I'm really worried about you. I mean we live together?! You know you can talk to me about anything. So please just tell me what's on your mind.'

Joan's tone had slowly become more serious at she talked, Sherlock could sense her worry and that was the last thing he'd want to burden her with. He could admit that his behaviour had become a bit unnatural since he heard of Moriartys escape but his main worry was actually about Joan. He sat up contemplating wether to just confess his worries and as he stared into her eyes he just couldn't stop himself from talking.

'It's you'

'Excuse me what?' Joan's confusion painted like a portrait on her face.

'It's you. I mean... there's no logical way to say this but I'm worried about you. As you know Moriarty has been known to take a large interest in you, and I know that she would be willing to break me. And if she's as smart as she is, then she will know that to hurt you is to break me.'

He sat there staring at his hands like a child who'd said something out of line.

Before Joan could even say a word the taxi had arrived outside and Sherlock rushed into it.

'Let's go to London!'