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At the end of No Exit (Episode 15 Season 4) of Battlestar
Galactica, Ellen and Boomer escape from the Cylon Baseship in a
stolen Raptor...  (Plot synopsis taken from BSG Wiki)  As they
make their way down a corridor, Ellen asks Valerii if she has
thought through taking part in John's plans. Valerii responds
that she has — and surprises Ellen by bringing her to a waiting
Raptor. Valerii then races the Raptor out of the baseship, which
launches pursuing Raiders. Dodging their gunfire, the Raptor
jumps away.  And in the next episode (Deadlock) they jump
exactly to where the fleet is:  In CIC, Louis Hoshi detects the
Raptor that Sharon "Boomer" Valerii and Ellen Tigh are on,
reporting that it (Raptor 702) was logged as missing over a year
ago.  Yet the Colonial Fleet had jumped several times since
Ellen and Boomer had been with them