Your question is mainly for the interpretation of an ayah of Quran, so instead of TRYING to interpret it over again myself, i will quote from an already existing tafseer:
31. Surah Luqman - Sayyid Abul Ala Maududi - Tafhim al-Qur'an - The Meaning of the Qur'an
He writes:
The words lahv al-hadith in the Text imply such a thing as may allure and absorb a listener completely and make him heedless of
everything else around him. Lexically, there is nothing derogatory in
these words, but in custom and usage they apply to evil and useless
and vain things, such as gossip, nonsensical talk, joking and jesting,
legends and tales, singing and merry-making, etc.
"To buy"
alluring tales may also mean that the person concerned adopts
falsehood instead of the Truth, turns away from the guidance and turns
to those things which can neither benefit him in the world nor in the
Hereafter. But this is the metaphorical meaning. The real meaning of
the sentence is that a person should purchase an absurd and useless
thing for his money, and this is supported by many traditions. Ibn
Hisham has related on the authority of Ibn Ishaq that when the
disbelievers of Makkah could not stop the message of the Holy Prophet
from spreading in spite of their best efforts, Nadr bin Harith said to
the people of Quraish: "The way you are counteracting this man will
avail you nothing. He has lived a lifetime among you. Until now he was
the best of your men morally: he was the most truthful and the most
trustworthy person among you. Now you say that he is a sorcerer and
enchanter and a poet and a madman. Who will believe all this? Don't
the people know the way the sorcerers talk? Don't they know the
enchanters and the way they conduct their business? Are they unaware
of poetry and of. the states of madness? Which of these accusations
sticks to Muhammad (upon whom be Allah's peace) by exploiting which
you would turn the people's attention away from him? Look! I will tell
you how to deal with him." Then he left Makkah for Iraq and managed to
get from there legends and tales about the kings of Iran and Rustam
and Isfandyar and started to arrange tale-telling parties to distract
the people from the Qur'an and to absorb them in the tales. (Ibn
Hisham. vol. I, pp. 320-321). The same tradition has been cited by
Vahidi in Asbab un Nazul on the authority of Kalbi and Muqatil. And
according to Ibn 'Abbas, Nadr had bough singing girls also for the
purpose. Whenever he heard that someone was coming under the Holy
Prophet's influence, he would impose a singing girl an him with the
instruction: "Feed him and entertain him with your songs so that he is
absorbed in you and distracted from the other side." This was the same
device which the arch-criminals of the nations have been employing in
every age. They try to get the common people so absorbed in fun and
sport and musical entertainment's in the name of culture that they are
left with no time and sense to attend to the serious problems of life,
and in their heedlessness they do not even feel what destruction they
are being driven to.
The same commentary of lahv al-hadith has
been reported from a large number of the Companions and their
immediate followers. 'Abdullah bin Mas'ud was asked, 'What does lahv
al-hadith mean in this verse ?" He said thrice emphatically. 'By God!
it means singing." (Ibn Jarir, Ibn Abi Shaibah. Hakim, Baihaqi).
Similar traditions have been reported from scholars like 'Abdullah
bin' Abbas, Jabir bin 'Abdullah, Mujahid, 'Ikrimah, Said bin Jubair,
Hasan Basri: and Makhul. Ibn Jarir, Ibn Abi Hatim and Tirmidhi have
related on the authority of Hadrat Abu Umamah Baheli that the Holy
Prophet said, "It is not lawful to buy and sell and trade in singing
girls nor is it lawful to take their price." In another tradition, the
last sentence is to the effect: ... it is unlawful to eat their price"
. Yet another tradition from Abu Umamah is to the effect: To teach
music to slave-girls and to trade in them is not lawful and their
price is forbidden." AII these Ahadith also elucidate that the verse
containing lahv al-hadith was sent down in this very connection. Qadi
Abu Bakr Ibn al-'Arabi has related in the Ahkam alQur'an a Hadith from
Hadrat 'Abdullah bin Mubarak and Imam Malik on the authority of Hadrat
Anas, saying, that the Holy Prophet said: 'He who hears the song of a
singing-girl in a musical concert, will have molten lead poured into
his ear on the Day of Judgment" (In this connection, one should also
note that the culture" of music in those days flourished almost
entirely through the slave-girls: Free women had not yet become
"artists" . That is why the Holy Prophet spoke about trading in
slave-girls, and described their wages and earnings as their price.
and used the word qaynah for the singing-girl, which is specifically
used for a slave-girl in Arabic).
So, after reading all this tafsir, coming back to your question, should we include tv shows or series into this idle talk definition or not?
I remember once i talked about this with a sheikh and what he said was that yes this also includes in lahv-al hadis, not that intensely as of listening to girls singing and music etc. But he told me that these all talk shows which have discussions for hours which are of no use, we leave many important things because of them, sometimes even salaah, we don't read quran and we listen to them, and just to make ratings and make people fight on their shows so their show can get popular, these all kind of things are included in this. Until or unless those are constructive and about the topics knowing about and discussing about which will benefit you in any way. And you are not missing your salaah etc because of them. He explained me the detailed meaning of word لھو which i don't remember exactly, but what i remember is that i was convinced.