Defending the Caveman at the D Las Vegas. Watch the battle of the sexes take a hilarious turn in ‘Defending the Caveman’ at The D Las Vegas, the longest-running play by a solo performer in Sin City history. Rob Becker’s celebrated script follows the twists and turns of gender and relationships, and gives a comedic nod to our cave-dwelling, mammoth-hunting pasts. You might laugh your way through every scene in this light-hearted 65-minute show, but you’ll leave the theater thinking. Book and Save 38% Off Defending the Caveman at the D Las Vegas.