"Kobol's Last Gleaming" is the two-part first season finale of the reimagined Battlestar Galactica television series. In the first part, the human fleet discovers the abandoned planet Kobol. A survey team is stranded there by Cylons while President Laura Roslin convinces Starbuck to disobey orders and retrieve the Arrow of Apollo. In the second part, Commander William Adama stages a military coup and places Roslin in Galactica's brig. Starbuck retrieves the Arrow and discovers that Boomer, still on Galactica, is a Cylon. This Boomer destroys the Cylon Basestar orbiting Kobol, returns to Galactica, and shoots Commander Adama; the season ends on a cliffhanger.