案情平淡，来听歌吧。
Joan在楼下沙发下想眯一觉。Sherlock又在楼上作妖，在和一个音乐人研究Pandasalt的音乐。Joan在楼下听到的是重金属，The Bloody Beetroots乐队的Rocksteady。这个音乐在电子游戏Asphalt 8，中文叫做狂野飙车的游戏中出现过。游戏迷们大概都熟悉。
MV中四个脏脏的人，破坏汽车，竖中指，喝酒，露点。让人看了想揍他们一顿。大概就是Joan此时想对Sherlock做的事吧？
结尾处，两位搭档来见Odin时，得知那个曾经的would-be murderer真的杀了人，杀的是自己的父母，然后自杀。这时我都有点动摇了，到底Odin是对的，还是男女主角的坚持是正确的？
这时的音乐是AA Bondy的Skull & Bones，一首略忧伤的慢歌，这首歌美剧Shameless也用过，第三季的某集。有个游戏也叫Skull & Bones，怒海战记还是碧海黑帆的，不过和这歌这剧都没什么关系。
Skull & Bones歌词:
There in the wheat,
I heard you sigh.
I don't know the size of it.
Who can know?
Patriot,
Under the spell,
Maybe howlin' underground,
Ear at the dirt.
Running home with the notion in your head
Running home with the notion in your head
Shadows on the land
Whiter the whale
Nothin' is wrong
I cannot be here today
I will not be Skull and Bones
Taking the fear Something for a hungry mouth
Something for
Running home with the notion in your head
Running home with the notion in your head
Shadows on the land
第13集完结
