Same-day showings for 'I Am Cait' have the E! series averaging 1.3 million viewers on Sunday.

E! may be playing the waiting game for those precious DVR views, but time-shifting likely can't change the tenor of I Am Cait's second week at bat.

The Caitlyn Jenner reality series lost more than half of its premiere haul on Sunday night, per live-plus-same-day ratings. The episode averaged 1.3 million viewers, down from 2.7 million viewers the week prior.

All told, the first episode of I Am Cait already has reached 7.7 million viewers. But that number is a combination of encores and time-shifting. The original telecast of I Am Cait's premiere fetched a more modest 3.9 million viewers with its first round of DVR views.

Though I Am Cait is bringing young viewers to its Sunday slot, 1.3 million viewers is lower than any episode of Keeping Up With the Kardashians ever has pulled among live-plus-same-day showings.

The series opened to lofty ratings expectations, thanks in big part to the record highs Jenner brought to 20/20 with her exclusive April sit-down with Diane Sawyer.