New 'Top Gear' host Chris Evans steps down after just one series

British TV and radio star Chris Evans said on Monday he was leaving BBC motoring show "Top Gear" after his first series at the helm ended with audiences at an all-time low. "Stepping down from Top Gear," he said on Twitter. The team are beyond brilliant, I wish them all the best." Evans and former "Friends" star Matt LeBlanc took over as co-hosts of the global hit show after Jeremy Clarkson was dropped by the BBC because he hit and verbally abused a producer last year.