"Once More unto the Breach" is the 157th episode of the television series Star Trek: Deep Space Nine, the seventh episode of the seventh season. This episode received a Nielsen rating of 4.5 when it was broadcast on television in 1998. The episode featured John Colicos reprising his role as Kor; J. G. Hertzler in his recurring role as the Klingon General Martok; and Neil C. Vipond, Nancy Youngblut, and Blake Lindsley in supporting roles.