HBO has released episode description for the 4th installment of Run season 1. Run Season 1 Episode 4 is titled “Chase”.
Run 1×4 “Chase” Episode Guide
Back on the train, Ruby (Merritt Wever) seeks guidance from a new friend and gets a wakeup call from home that leaves her shaken. Meanwhile, Billy (Domhnall Gleeson) continues to lie about Fiona (Archie Panjabi), who raises the stakes to get what she wants.
Kate Dennis directed the episode written by Georgia Pritchett. Run Season 1 Episode 4 airs on May 3 at 10:30|9:30c on HBO.