Alex Marlowe

Alex Marlowe was a former rock star turned geneticist who tried to genetically engineer a new strain of Krynoid. He wanted to save the planet by any means necessary. He later took Lucie Miller prisoner and wanted to use her for her experiments. He tried to strike a bargain with the Krynoid, but fell under their influence. He was killed when the Doctor destroyed the facility and the Krynoid. (AUDIO: Hothouse)

Behind the scenes
On the blurb of Hothouse, the character is named "Alex Marlow", while on the cast list, he is named "Alex Marlowe".