Complex sentence: The person playing the'Host' of the show is Alex Humes, although fairly unknown, he recently starred in the reality TV programme "Space Cadets", also for Channel 4, where he played one of the Russian Pilots.
Split into simpler sentences: The person playing the'Host' of the show is Alex Humes. Although fairly unknown, Humes recently starred in the reality TV programme "Space Cadets", also for Channel 4, where he played one of the Russian Pilots.