Timelion is a versatile time series composer for Kibana, developed as part of Elastic's {Re}search initiative, which allows users to aggregate and visualize time series data from various sources using a simple one-line expression language. Created by Rashid Khan during a transatlantic flight, Timelion enables the execution of complex queries and transformations by chaining functions and combining data from multiple sources, including the World Bank's Data API and Elasticsearch. With 25 built-in functions ranging from basic arithmetic to advanced analytics like moving averages and derivatives, Timelion fosters innovation by inviting users to contribute new functions and share their experiences. Timelion is readily available as a plugin for Kibana and can be tried through Elastic Cloud, offering users an accessible platform to explore their data-driven inquiries and generate insightful visualizations.