Sbagliate: quello in guerra era Ricky, che si allontanò per una/due stagioni per apparire ogni tanto.
Quest altro fratello c'era solo nelle primissime puntate e fu fatto scomparire da una puntata all'altra senza spiegazioni. Uscì per fare allenamento di basket e non tornò mai più.
Forse comprò delle sigarette nel tragitto, causa frequente di scomparsa...
Forse un fondo di ragione Yoshi ce l'ha, ma secondo me ha tirato a indovinare:
Chuck Cunningham syndrome is a phenomenon observed when a regular character in a television series leaves with no explanation, and is never referred to again despite the character's previous importance either to the show or to the other characters. The term has been used since at least as early as 1997.
The term derives from the Chuck Cunningham character from the American series Happy Days (1974-1984). Chuck, the oldest of the three children in the Cunningham family, first appeared in the pilot episode "Love and the Happy Days" (aired as part of the series Love, American Style). However, when Happy Days became its own series, Chuck appeared as a minor character (usually seen on his way to basketball practice). He was written out of the series at the beginning of the second season with the explanation that he was going off to college. After the second season, he was never mentioned again. Subsequent episodes referred to the Cunninghams as having only two children (Richie and Joanie).