集 (jí) as a noun means a collection or anthology of written works (e.g., a story collection). As a classifier, it counts episodes of a TV series, etc. Unlike 收藏 (shōu cáng), which is the verb 'to collect' (action), 集 is the result or unit. Unlike 丛 (cóng), which classifies clusters of plants or book series (丛书), 集 is specific to episodes.