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Showtime’s combo of “Homeland” and “The Affair” continue to steadily grow their audience, with both shows posting season-high ratings on Sunday.

According to Nielsen estimates, the regular-timeslot airing of “Homeland” averaged a season-best 1.66 million viewers — its fifth straight week of growth since drawing 1.22 million on Oct. 12 — and a season-best 2.1 million viewers for the night. On the comparable night a year ago, the drama drew 1.78 million regular-timeslot viewers.

First-year drama “The Affair” also delivered its most-watched episode of the season with 778,000 viewers at 10 p.m., up 16% from last week and 53% higher than the series premiere. For the night, “The Affair” drew a season-best 985,000 viewers.

Including all platforms, “Homeland” is averaging 5.6 million total weekly viewers, with 74% of that audience watching on a delayed basis. And “The Affair” is averaging 3.8 million weekly viewers, with time-shifted viewing accounting for 86% of the total number.