According to Variety, Showtime’s recent expansion from premium cable channel to streaming service has hit a hitch courtesy of 20th Century Fox. The studio recently sent a letter questioning whether Showtime was within its rights to make “Homeland,” a series produced by Fox 21 Television Studios, available on the streaming service. Reps for both Showtime and 20th declined to comment on the letter, which came to light via a report on Deadline published Thursday. But sources indicate the bone of contention is whether the contract between the companies regarding “Homeland” entitles Showtime to make current and previous episodes available on a digital outlet that didn’t exist at the time they agreed to partner on the series.