Audiences have spent five years watching Dr. Temperance Brennan (Emily Deschanel) and FBI Special Agent Seeley Booth (David Boreanaz) in action on Fox's 'Bones,' but they don't know how the duo became so dynamic. That will change on April 8 when 'Bones' (Thurs., 8PM ET on Fox) celebrates 100 episodes.

Series star Boreanaz directed 'The Parts in the Sum of the Whole,' which recounts Booth and Brennan's first case together. "David did a great job," said executive producer Stephen Nathan in an interview with AOL TV.

'Bones' is known for one of the most talked about "will they or won't they?" relationships, and Fox is teasing that the duo's walk down memory lane has a profound effect on them -- and could change their feelings for each other forever.

Not only will the relationship between Booth and Brennan be examined, but audiences will also get a glimpse at how the relationships between the other Jeffersonian team members began.

"[The 100th episode] is sort of the prequel so that we see how the series began, how [Booth and Brennan's] relationship began, why their relationship is the way it is and perhaps seeing what the future of this relationship might be, even if [they] don't acknowledge it themselves," Nathan explained.