El Chavo del 8.
Is it leftist? No, but shows in a comedic light the lifes of various families in a housing bloc owned by "Don Barriga" (Mr. Tummy) and the poverty of Chavo, an orphan who, having nowhere to live, lives in a barrel in this bloc.
He is friend with Chilindrina (the daughter of a unemployed and widowed worker, Don Ramon) and Quico (the conceited son of the singlemother owner of a low class restaurant, Doña Florinda-idk how you gringos call menus-). Also there is Teacher Jirafales, who is couting Doña Florinda, La bruja del 61 (a spinster who lives in the 61 apartment who has a crush in Don Ramon), and Ñoño (son of Don Barriga and a little less conceited than Quico, acted by the same actor that plays Don Barriga)
The show was aired in Televisa, a Close (this level of close) tv station to the PRI goverment (who wasn't so leftist) and by some is considered a piece of opium to the masses, and by other leftist a portrayal of a working class neighborhood (with the problems and class strugles in it).
It is pretty fun indeed. IT still airs in my country in the prime TV stations.