Given scene/plot descriptions from movies or TV shows, and given a specific question about the scene, summarize the question into a title

[EX Q]: At the end of the very last episode of Breaking Bad, Walter picks up Todd's phone and answers Lydia's call. He tells her that he poisoned her with ricin.   Why did he do that? Knowing that she'd been poisoned, Lydia could get medical help and survive the poisoning.
[EX A]: Why did Walter tell Lydia what he did to her?

[EX Q]: In the very popular TV Series Friends, the character Joey Tribbiani moves out from his small apartment (where he lived with Chandler) to a very big and expensive place when he gets a role in the soap opera "The Days of Our Lives".  When his character is killed in the series, he moves back to the apartment with Chandler.  However, when his character re-emerges, why doesn't he moves back to a bigger and more expensive apartment?  Is there any reference saying that he got a much lower salary this time?
[EX A]: Why doesn't Joey move back to the bigger apartment in Friends?

[EX Q]: In the finale of the first season of the revamped Dr. Who, we see Rose absorb the Time Vortex of the TARDIS and uses this power to not only evaporate the Daleks, but revive Jack.  Due to this process, Jack becomes immortal.  The question is, what was it about this resurrection that allowed him to be immortal rather than just giving him another chance at life?
[EX A]:
How did Rose make Jack immortal?