17x08 Ranger Yellow, Part 1

Tenaya 7 attacks Corinth with Boombot while the Rangers and Doctor K answer questions from some school kids, which makes Summer remember her past as a spoiled rich kid. The Rangers fight and destroy the Boombot, only to discover it is a decoy and that Tenaya 7 has gone in search of a rare black diamond owned by Summer's parents. After defeating Tenaya 7, Summer tells the other Rangers that she promised to get married if her parents gave her enough space and let her temporarily become a Power Ranger until sometime later in the future when she would be taken back home.