Mouse's Old Home is the original home owned by Mouse Fitzgerald and his wife Woman Mouse and a daughter. This house was owned by him in his past, before he moved in to his actual house in the series. The home only appears in his dreams/flashbacks in over three episodes, though the latter episode had it as part of a simulation. Not much of the house is seen, as its shown only in the night, and a few rooms are seen but the exterior is never seen. Aside from Mouse's family, The Shadowy Figure is seen appearing through the doorway, and at some point in time, Mouse's daughter had to morph into a Spider.
Mouse's birthday was also celebrated in this home.
The home is only seen in the interior as its colored gray, it has a table with small black lines are seen, a big light on the ceiling, a Clock on the wall, the back is seen to the left as possibly a door or pathway to a another room, the shelf has drawings of guns, and few other objects, such as big lines are on the bottom of this shelf. Mouse's daughter is seen in a crudely drawn baby crib, the opening of the house is seen, and The Shadowy Figure stands in a white door. When Fitz is talking to The Shadowy Figure who quit something to do with Q109, he stands in an empty gray room.