create his monster. James Chapman suggests that director Derek Martinus drew from the Christian Nyby film The Thing from Another World in realising Hayles' scripts, particularly the concept of an alien frozen in ice near an isolated science base. Hayles had envisioned the Ice Warriors as cybernetic creatures, but designer Martin Baugh, fearing comparisons to the established Cybermen, instead designed costumes with vaguely reptilian features. After their first appearance, in 1967's The Ice Warriors, they were a success and were brought back in 1969 for a second serial. Peter Bryant, the producer of Doctor Who by 1969, also felt that a second appearance might better justify the expensive Ice Warrior costumes employed in their debut serial. Physical characteristics Martin Baugh was the costume designer for The Ice Warriors and was responsible for the decision to make the Ice Warriors reptilian humanoids. As a costume designer, Baugh preferred to work with new materials, with Piers D Britton and Graham Sleight noting that, in designing the look of the monsters, Baugh crafted the armour from fibreglass. Sleight further comments that the sculpting of this armour is reflective of crocodile skin, suggesting their reptilian nature. Actors like Bernard Bresslaw (who portrayed the Ice Warrior Varga in their first appearance) used a sibilant whisper to demonstrate both the reptilian qualities of the monsters as well as to suggest that the Martian atmosphere is composed differently from that of Earth. The hissing voice is believed to have been developed by Bresslaw. Ice Warriors also have sonic weaponry built into their wrists. The Seeds of Death introduces an officer caste often referred to as Ice Lords. They are less armoured than their soldier counterparts and lack their mounted sonic weaponry. Common to both the Ice Warriors and Ice Lords are claw-like gloves. For the return of the characters in 2013's "Cold War", these became three-fingered gloves, similar to another Doctor Who alien, the Sontarans. Neill Gorton chose to make the creatures appear "beefier and stronger", redesigning the Ice Warrior armour to resemble plating. Urethane rubber was used, which is more flexible and comfortable than fibreglass. Mark Gatiss says that he insisted on remaining true to the original Ice Warriors design for their return appearance. "Cold War" also depicts an Ice Warrior removing its armour for the first time within the series, something that the Doctor says is the ultimate disgrace for an Ice Warrior. The episode