Lisa Bonet Sentenced to 'Life on Mars'
 
Denise Huxtable's about to inhabit a 
truly different world. 
Former 
Cosby Show offspring Lisa Bonet is joining the cast of ABC's adaptation of the time-tripping U.K. cop drama 
Life on Mars, sources confirm to me exclusively.  Bonet will play Jason O'Mara's present-day girlfriend. 
Bonet's hiring comes on the heels of another high-profile 
Mars casting: Earlier this week, Gretchen Mol 
signed on to play O'Mara's circa '73 squeeze, setting the stage for one unorthodox love triangle. 
Previously announced 
Mars inhabitants include 
Harvey Keitel and Michael Imperioli.