Star Wars: The Clone Wars, Season 5

Darth Maul:
[Sidious impales Savage Opress with his lightsabers] Brother!

[Sidious force pushes Opress away and Maul runs towards his wounded brother and holds his hand]

Savage Opress:
[mortally wounded as his body turns back to its normal state] Brother, I am an unworthy apprentice. I'm not like you. I...never was. [dies. Maul looks stricken, then enraged as Sidious cackles behind him]

Darth Sidious:
[to Maul] Remember the first and only reality of the Sith; there can only be two...and you are no longer my apprentice.[Maul looks in anger at him] You have been replaced.

[Maul and Sidious continue fighting, with Sidious defeating him]

Darth Maul:
[Pleading] Have mercy! Please, please!

Darth Sidious:
There is no mercy. [tortures Maul with Force Lightning] Do not worry, I'm not going to kill you. I have...other uses for you. [laughs as he continues torturing Maul]