In other pilot-casting news, MIA Dawson's Creek alum James Van Der Beek has resurfaced in CBS' Sex, Power, Love & Politics.... Desperate Housewives' Steven Culp has joined ABC's Traveler.... Sex and the City's Ron Livingston has grabbed one of the two leads in Fox's Primary.... Threshold's Peter Dinklage will play the Scientist in CBS' superhero drama Ultra.... 24's Jonah Lotan (aka Spenser) has been cast on Fox's Beyond, while former cast mate John Allen Nelson (née Walt) has joined Fox's Vanished.... and CBS has picked up Waterfront, a drama from ER vet Jack Orman and starring The Sopranos' Joe Pantoliano as an ethically challenged Providence, R.I., mayor.