!!The 1970s series
* At the end of "The Fight of the Felix", when Oscar takes a punch for Felix and they have their "standing up for each other" talk.
* A meta moment; when Jack Klugman was hospitalized for throat surgery, the first person to come to his side was his dear friend Tony Randall.
* The ending of "The Fat Farm" where Oscar tells Felix that he'll be happy even if he only lives 20 more years while Felix lives 25. Felix's (tearful) response? "I'll miss you."
* PaulWilliams ParentalLoveSong from "The Paul Williams Show."
!!The 2015 Series
For a modern-day sitcom, this series has a surprising amount:
* In the pilot, Felix showing the slideshow of his and Oscar's trip to the beach with their (now ex) wives, and Oscar slowly realizing he misses his ex-wife.
* Oscar gives up the chance to have sex with Casey, a professional model, to track down and comfort Felix, who's depressed because it's his first birthday since separating from his wife and because they happened to meet on his birthday as well.
* "Sleeping Dogs Lie" reveals that the Madisons and the Ungers had annually gone on vacation together while they were still married. However, by the time of their most recent one, Oscar and Gabby had gotten a divorce, and unbeknownst to Oscar Gabby had taken to dating a 28-year-old Brazilian bodybuilder, whom she had brought along with Felix and Ashley on this last vacation. Knowing it would've crushed Oscar to find out the truth, Felix had instead lied to him and told him he and Ashley went alone.
** However, Oscar becomes furious once he learns the truth and blows up on Felix, calling him a "bad friend" and a liar. At the end of the episode, however, he apologizes, saying that honesty is a sign of a ''good'' friend, not a bad one.
* Emily [[spoiler:finally confessing her feelings]] to Felix in "The Audit Couple".