Heroic BSOD: Went through a fortnight-long one after Cassandra miscarried in the second episode of the 1996 Christmas trilogy, "Modern Men", until he and Del talked about it in the third chapter, "Time On Our Hands".
Identical Grandson: In the 2003 OFAH Christmas special and final episode "Sleepless in Peckham", Rodney discovers through an old photograph of the 1960 Jolly Boys' Outing that his biological father is not Reg Trotter, but rather gentleman thief Freddie "The Frog" Robdal.
Dreadful Musician: He certainly isn't the best pianist around, but Mike tolerates his piano playing on the grounds that it prevents people from noticing that the Nag's Head's jukebox has been broken for years.
Suspiciously Similar Substitute: For Grandad. More blatant in his first few appearances, in which he was just filling the role that Grandad would have filled if not for Lennard Pearce dying, but he soon started to be portrayed as being more physically capable and less of a Cloud Cuckoolander than Grandad, along with his navy background playing a more important part in episodes.
Closer to Earth: To much less of an extent than Raquel, though. She's definitely the more sensible one out of her and Rodney, but Rodney is himself generally more sensible compared to Del Boy, and Cassandra is both insanely career driven and prone to acting like a spoilt brat at times.
Running Gag: Whenever Del wants Rodney to do something for him, he always brings up what Joannie said to Del on her death bed. This was lampshaded in the fourth season OFAH episode "It's Only Rock and Roll" when Rodney tells Del about a row they had on whose turn it was to go and get the fish and chips, and Del claimed that Joannie said on her death bed, "Send Rodney for the fish."
Sympathetic Adulterer: Reg is neglectful, crude, abusive, and all too happy to sit at home, watch Joan bring home the bacon and then waste her meagre wages down the pub. Is it any wonder she jumps into bed with Freddie Robdal - debonair and attentive, if somewhat unreliable and immoral - the first chance she gets?
The Other Darrin: Played by Jim Broadbent in "May The Force Be With You", the 1985 OFAH Christmas special "To Hull and Back", and "The Class of '62", and by Calum MacNab in the first two episodes of the Rock And Chips trilogy.