This page lists appearances of Blon Fel-Fotch Passameer-Day Slitheen, also known as Margaret Blaine, in the order in which she experienced them. This timeline is based upon observations of the Doctor Who universe and the events that occur during each of these stories. From these observations we have attempted to build a concise timeline. It is assumed that for each novel, comic, audio or television series, their published, broadcast or numbered order is the order they occur in.
- Blon Fel-Fotch Passameer-Day Slitheen, in the form of "Margaret Blaine", has been elected as Mayor of Cardiff. As such, this story must take place not long before Boom Town, in which a newspaper promotes her as the "New Mayor".
- Six months following World War Three, Blon attempts to use the Cardiff Space-Time Rift to destroy and escape Earth before being reduced to an egg and looking into the heart of the TARDIS. The Doctor intends to take the egg to Raxacoricofallapatorius where she may have a second chance at life.