There are no allusions available for this episode at this time. Be the first to add some! Just click on the edit tab under the section heading and start typing. An allusion is an incidental reference made to a character, person, event or other miscellaneous piece of media that can be found somewhere in the episode itself. In most cases, this refers to characters or events from previous episodes.
When Sherlock and Watson are in the kitchen talking, Watson puts the kettle on the hob, then gets a mug out and puts it on the counter. Several times when the camera pans back to Watson the mug has moved to the opposite side of her mobile phone, then back again. 
When Holmes hears that Bundsch has a second home on Oneida Lake, he immediately thinks of contacting the Onondaga County Sheriff and traveling to Syracuse, but Oneida Lake is in Oneida and Oswego counties. It's Lake Onondaga that's in Onondaga County and near Syracuse. 
There are no quotes available for this episode at this time. Be the first to add some! Just click on the edit tab under the section heading and start typing. The preferred format for quotes is an asterisk, followed by the character's name (bold and hyper-linked), semi-colon then the quote itself (without quotation marks. Quotes should be separated by four elipses (....) unless multiple quotes are used between characters as part of a conversation.