Bones Booth (David Boreanaz) struggles with the loss of Sweets (John Francis Daley, not pictured) in episode 2 of "Bones" Season 10. Photo: FOX

Warning: Thursday’s “Bones” might get a little heavy. After Sweets’ (John Francis Daley) murder in the Season 10 premiere of the hit FOX show, Booth (David Boreanaz) and Brennan (Emily Deschanel) must find the source of the conspiracy before someone else gets killed. A sneak peek scene of the next episode, “The Lance to the Heart,” reveals that Sweets might have left them one last clue.

The preview video shows the Jeffersonian Institute team analyzing the indentations left behind by the stylus of the pen Sweets was using to take notes during his investigation. The results are a few last clues left behind by the FBI Agent. The clues reference both Harold Cooper, the EPA official who is the key to conspiracy, and Sanderson (Sam Anderson) the man in charge of the company that might have killed him. Sweets’ notes also suggest the conspiracy could be tied to a religious cult.

Watch the sneak peek video for episode 2 of “Bones” Season 10 below:

There will be a lot more Sweets in the new episode as well as Booth, Brennan and company struggle with the loss of their friend. E! Online confirmed there will be more than a few tear-jerking moments in episode 2 as well as a funeral. Hopefully, the funeral can help fans (who have taken the death pretty hard if social media is any indication) get some closure.

Will Booth and Brennan be able to put a stop to the conspiracy with the help of Sweets’ notes. Plus, what can fans expect from the emotional funeral for the fan favorite character? "Bones" Season 10 episode 2, “The Lance to the Heart,” airs Thursday, Oct. 2, at 8 p.m. EDT on FOX.

What do you hope to see out of Sweet’s funeral? Tweet your thoughts to @Ja9GarofaloTV.