Image editing: Scene showing on TV screen replaced

"We all know Dad watches cartoons every chance he gets. Nothing wrong with that, but he won't admit it! It's a sort of family joke. Here's a photo we took of Dad watching TV (officially!). Would you put plant a scene from Tom & Jerry on the TV screen, and write "Happy birthday Dad" across the bottom. Want to surprise him with this on his birthday next Wednesday! (Also. please get the cables out of the picture,and clear the shelf below the TV.)"