크레딧 출연 Tom Baker The Doctor Louise Jameson Leela John Leeson K-9 Mk. I (voice) / Nucleus (voice) Michael Sheard Lowe Brian Grellis Safran Jay Neill Silvey Edmund Pegge Meeker Frederick Jaeger Professor Marius 스텝 Derrick Goodwin Directing Dave Martin Writing Bob Baker Writing Robert Holmes Writing Graham Williams Production Dudley Simpson Sound