The first episode will air on
Saturday 26th of December from 9:00pm to 10:00pm on BBC One. Episode two will air on
Saturday the 2nd of January 2016 and the 3rd
Saturday the 9th of January 2016.
others characters episode synopses here :
http://theconsultingdetectivesblog.com/2015/12/03/and-then-there-were-none-promotional-pictures/