The new show will feature interviews with fired candidates, alongside industry experts and celebrity fans, dissecting the drama and behind-the-scenes insights.
Scanlon expressed her excitement to be part of The Apprentice as it enters its 20th year, having recently participated in a celebrity version of the show.
Comedian Tom Allen stepped down from presenting You're Fired after six years, citing new ventures and thanking the cast and crew.
The first episode of The Apprentice: Unfinished Business is scheduled to air on Thursday 29 January at 10:05pm on BBC Two and BBC iPlayer.