Number + 集
The classifier 集 (jí) is used to count episodes of a TV series, drama, or similar serialized content. When referring to a specific episode, use a number followed by 集, such as 两集 (two episodes). It is the standard measure word for episodes in Chinese.
这部剧一共二十四集,我已经看了十集。
Zhè bù jù yīgòng èrshísì jí, wǒ yǐjīng kàn le shí jí.
This drama has twenty-four episodes in total, and I've already watched ten.
昨晚更新了两集,我熬夜全看完了。
Zuówǎn gēngxīn le liǎng jí, wǒ áoyè quán kàn wán le.
Two new episodes were released last night, and I stayed up all night to finish them.
最后一集的结局让很多观众感到意外。
Zuìhòu yī jí de jiéjú ràng hěn duō guānzhòng gǎndào yìwài.
The ending of the last episode surprised many viewers.