Moving On (aka Sara and the Marshal) - S4.E5

With the 'romance' of Felicity and Gus progressing, Sara is feeling left out. Then Zak Morgan, and his ""Wild West Show"" come to town and Sara loses her heart. Hetty and Olivia are very concerned that Sara is getting into a dangerous situation. Sara rodeo rides to impress Zak, and asks if she can join his show. Zak agrees, but when the time comes and the show leaves town Sara is left behind.