Disclaimer: I do not own Sherlock Hound/Meitantei Holmes, Danger Mouse (2015), the original Sherlock Holmes or any canon characters. They belong to their respective owners.

Notes: This is one of those fics that was inspired by a prompt on otpprompts on Tumblr that has an OTP from one world wind up in the world of another OTP where the latter pair takes care of the former while helping them return. Considering my fics have been focused on these two series, it's no surprise this was born.

Because of the series I am using, I decided to try writing this in first-person, as if Watson and Penfold had written the account of the adventure. To avoid the confusion, Holmes is Hound, as he usually is in my other fics.

This fic contains slash; the pairs are Dangerfold (Danger Mouse x Penfold) and SHound!Johnlock (Hound x Watson). It's not a major factor in the story, though does come up now and then.

I hope you enjoy this!

(Linebreaks hate me so I will use HWDP when it's Watson's POV and DPHW when it's Penfold's POV.)

HWDP

I believe this was certainly the strangest case my good friend, Sherlock Hound, and I have ever dealt with, and that, dear reader, is no exaggeration. Ahh, but I am getting ahead of myself as always. Hound did always tell me I had an unfortunate habit of doing that. So, I shall have to start from the beginning...

It was a wintery January morning of the year 1911. Hound was lounging on the divan, plucking away at his violin while I stood at the window, just watching as London carried on business as usual. It was as I saw our dear housekeeper Mrs. Hudson leave the premises to carry out her errands that I had heard my friend's voice.

"Observed anything of interest, my dear Watson?"

I informed him that it was rather quiet outside so there was nothing to observe.

He sighed and shook his head at that response. "Oh, my dear fellow, there is always something to observe if you look with more than your eyes. You know my methods, Watson, apply them. Focus on a singular object or person and observe them with great delicacy."

I nodded and cast my gaze around to something of interest. It was then when I spotted two rather strange individuals walking down the path and stopping at our front step. "Well, I don't even think your methods would be necessary to realise the pair I just spotted at our step are peculiar."

"How so, Watson?"

"One is a white mouse with an eyepatch over their left eye and one is a brown hamster in a suit and spectacles."

Needless to say that immediately grasped my companion's attention. "A mouse and a hamster, you say?"

I was prepared to elucidate, but my words caught at the sound of the doorbell. "Mrs. Hudson left a few minutes ago. Shall I go see what they're after?"

"I'll accompany you." He rose to a sitting position and set his Stradivarius into its case. "Come, my dear Watson, I have a feeling we may be in for a most interesting day." At that, he stood and marched straight to the door of our sitting room.

I immediately followed after him, just as he'd hoped I would. "Hound, what do you suppose those rodents are after?"

He had already reached the bottom of the seventeen steps before responding that he intended to find out exactly that. Not three seconds later, he was at the front door, while I was still on the third step from the bottom of the case. Hound opened the door and looked down to see the pair of rodents I had described. "Yes, how may I help you?"

The mouse was the one to speak. "Good morning to you, good sir." His voice was charming on the ears, that of a true gentleman. "Might I enquire as to where I may find two hundred and twenty-one B Baker Street?"

"That is this address."

The hamster appeared quite distressed at hearing that. "Oh, crumbs, Chief! That rotter really did it this time!" The hamster's voice was much higher, though not necessarily shrill.

The mouse turned to the hamster and smiled reassuringly. "Come now, Penfold, we can get it worked out." He then returned his one-eyed gaze to my friend. "So, now that I know this is the address I was seeking, may I enquire as to the date, including the year? Also, is everybody in your world of a canine appearance?"

Hound nodded in response to the queries before answering that it was January the second of the year 1911 and that, yes, everyone in this world does have a canine appearance. He then proceeded to introduce himself. "My name is Sherlock Hound, I am a consulting detective. This gentleman here is my dearest friend and colleague, Doctor John H. Watson. Now then, why were you seeking this address?"

"Because, Mr. Hound, Penfold and I live at it. In our world, anyway."

Having piqued Hound's attention at that, the pair were invited inside. He led them upstairs to the sitting room, I followed after the hamster referred to as Penfold.

HWDP

"Before I can hear you two out, may I enquire as to whom you are?" Hound asked, gesturing for his newest, and quite unusual, clients to sit on the divan. He moved to sit on the armchair opposite and I took my place standing beside him. I had a notebook and pen in my paws, ready to scribe the particulars of the case.

"You may. This fellow here is my best friend and assistant, his name is Ernest Penfold. As for myself, I am known as Danger Mouse, the World's Greatest Secret Agent." I noted there was a slightly cocky tone to the mouse's voice at that last proclamation, though it seemed his hamster companion did not appear bothered.

Hound nodded in acceptance at that response. "Now then, you'll have to tell me everything that happened. Leave nothing out for even the most trivial fact may prove to be important. Both of you may fill in the particulars, or you can leave it to just the one of you. However, I am only after the facts that relate to this, so please stay on subject." At that, Hound leaned back in his chair and closed his eyes while steepling the tips of his fingers.

I quickly took the time to reassure Danger Mouse and Penfold that Hound was listening intently to what they were to say.

Penfold looked up at Danger Mouse. "Can we both tell it? Please, DM?" I immediately realised DM was a nickname that only those closest to Danger Mouse were permitted to use.

"Only if you stay focused, Penfold. If you should veer off-track, then I shall have to do this by myself."

"I won't, I promise."

"Very well then."

So it was, dear reader, that Hound and I would hear what could only be described as fantastical.