S3 Ep12: "Survival of the Fittest". Definitely one of the best episodes of an overall strong season in which we get to see just a little more of all the dysfunctional relationships we're used to but also how much they all truly love each other. (Spoilers) Lip graduating from high school and being accepted into MIT, Ian enlisting in the army and saying goodbye to a clearly but reluctantly heartbroken Mickey whose usual inability to express his love is again displayed as one of his greatest downfalls and the affection shown by an otherwise indifferent and, frankly, violent Carl for his sick father by shaving his head in order to "let the sunshine heal him" the way it'd cured Carl's "cancer", allowing us to witness a truly kind act performed by Frank, whose character development became apparent in this season but still managed to deliver a sucker punch to the audience.
The finale was definitely as emotional as can be whilst wrapping up some of the ever expanding storylines involving increasingly uninteresting and some truly annoying characters - I'm looking at you, Karen - effectively and letting us experience once again the all encompassing love between the characters. Well done, Shameless, well done.