John McIntire (Preston DeKalb) and Jeanette Nolan (Lucy Cash) were husband & wife in real life - from 1935 until his death in 1991.
2nd Hulk outings for Eric Server (Randy) and J. Jay Saunders (Agent Garnett), who played 'The Policeman' in the pilot episode and the 'Controller' in '747' respectively.
In this episode, Lucy shows David the money saving trick of using one teabag for two cups of tea. David acts as if he were unfamiliar with the trick, but he suggested it in the "Long Run Home" episode which aired 4 weeks prior. It's possible that "Rock and a Hard Place" was filmed prior and the stories were aired out of order.
The 2nd Hulk Out uses excerpts from the 1st Hulk Out in 'My Favorite Magician'