Subject + 集 + Object
集 (jí) is a verb meaning "to gather" or "to assemble." It can also function as a noun meaning "episode" (of a TV series) or "collection." In the context of a show, saying something 集 attracted a large audience means that the episode drew many viewers.
这部剧一共二十四集,我已经看了一半了。
Zhè bù jù yīgòng èrshísì jí, wǒ yǐjīng kàn le yībàn le.
This drama has twenty-four episodes in total; I've already watched half.
昨晚那集吸引了超过三千万观众。
Zuówǎn nà jí xīyǐn le chāoguò sānqiān wàn guānzhòng.
Last night's episode attracted over thirty million viewers.
大家集在广场上等着看演出。
Dàjiā jí zài guǎngchǎng shàng děngzhe kàn yǎnchū.
Everyone gathered in the square to wait and watch the performance.