Ed Begley Jr. joins 'Gary Unmarried'

CBS comedy stars Jay Mohr

Ed Begley Jr. has joined CBS' new comedy "Gary Unmarried," which stars Jay Mohr as a newly divorced dad.

Begley will play the family's intelligent but pompous therapist who counseled Gary and his wife Allison (Paula Marshall) during their divorce and is now engaged to Allison. The role was played in the pilot by Larry Miller.

Begley's most recent credits include the feature "Pineapple Express" and HBO's 2000 presidential election drama "Recount," in which he played attorney David Boies.

Meanwhile, Katie Cassidy ("Supernatural") has been cast in another new CBS series, horror drama "Harper's Island."

The serialized series revolves around a group of friends who meet on an island off the Seattle coast for a destination wedding.

Cassidy will play the bride-to-be, joining Christopher Gorham, who was recently tapped as the groom.

Cassidy replaces Samantha Noble, who played the role in the presentation.