warns Lisa of a bomb he planted in the airlock tunnel to destroy the Tiger Moth. Lisa places the bomb in the assault ship, and Steg helps her escape the closing airlock before he dies. Lisa and Kurt watch on the scanners as the assault ship departs and explodes. Lisa tends to Kurt's injuries, thinking that this disastrous shakedown cruise will be the end of her solar racing career. However, Kurt reveals that, as the sole surviving syndicate member, he inherits the others' shares in the Tiger Moth's finances, so he can afford the repairs and hire a professional crew. With Lisa and Kurt now racing partners and in a relationship together, the captain contacts station Beta to start preparations in time for the upcoming race. Cast Jan Chappell as Tiger Moth Captain Lisa Deranne. The heroine of the story, Lisa is hired by a group of wealthy individuals to help them pilot the solar vessel and win competitive races. Whilst she has an antagonistic relationship with most of the group, she later forms a close bond with Kurt and, along with him, is one of only two survivors at the end. Jan Chappell had previously played Cally in Blake's 7 alongside Kurt actor Brian Croucher. The role of Lisa Deranne was originally offered to Elisabeth Sladen, but she declined citing family commitments. Brian Croucher as Kurt. A mysterious self-made industrialist, Kurt recognizes the Sontarans based on information he has obtained from an individual implied to be The Doctor. Along with Captain Lisa Deranne, he survives at the end of the story and becomes the sole owner of the Tiger Moth. Brian Croucher had played Travis 2 in Blake's 7 alongside co-star Jan Chappell. Carole Ann Ford as Zorelle, a vain and wealthy fashion designer (although it is suggested by Mari that it is actually her sister that is the brains of the company) who also drinks too much; she is killed by the Rutan shapeshifter which later assumes her form at the conclusion of the story. Ford was best known as playing Susan Foreman, the granddaughter of the Doctor in the original series. Sophie Aldred as Mari, the fiancée of Nikos; the spoilt and pampered daughter of a planetary president, she is stunned by the Sontarans and later killed by the Rutan when it invades her quarters- the Rutan form of Mari then kills Zorelle. Aldred had previously played