BBC Press Office has updated - but now has left things confused.
It confirms that the Formula 1: Brazillian Grand Prix Qualifying is on BBC One, however, Casualty is moved to Sunday (with nothing on the Saturday), and Merlin doesn't appear to be no where.
There's nothing that suggests that Casualty is a two parter that weekend. Here's the current confirmed schedule:
Saturday 17th October
13:00 - Gymnastics – World Championships
16:30 - Final Score
17:05 - BBC News
17:20 - Formula 1: The Brazillian Grand Prix Qualifying
19:15 - Strictly Come Dancing
21:25 - Lottery [presumably]
21:35 -
Sunday 18th October
16:00 - Formula 1: The Brazillian Grand Prix
19:10 - Countryfile
20:10 - Casualty (note - the date on BBC PI is also in red - meaning it has been moved from the Saturday)
21:00 - Emma
Holby City I should note is also down for Tuesday and Wednesday of that particular week.