Theodore meets the Transformers is the 18th episode of Season 4.
Theodore is helping Bonavista clean away some rocks from a small cove when he uncovers a robot. The robot is black and yellow. Theodore takes it to the repair dock and the robot springs to life. The robot reveals that he is in fact the Autobot scout Bumblebee, who is on a mission to find the legendary Decepticon Megatron. Bumblebee meets Theodore's friends: Hank, George, Emily, Foduck and Lucy and contacts Optimus Prime, Ratchet, Bulkhead, Arcee, Wheeljack, Smokescreen, Knock Out and Ultra Magnus. Once they arrive, Megatron shows up, planning to find Energon in the depths of the harbour. Together, the tugs and the Autobots fight Megatron off and save the Big Harbour and Optimus awards Theodore and his friends by placing the Autobot symbol on them.
Narrator: It was a beautiful day in the Big Harbour and Theodore was helping Bonavista Barge clean up some rocks from a small cove just outside the Harbour.
Theodore: You missed a bit over there, Bonavista!
Narrator: So Bonavista carefully remove some rocks to left. But suddenly, her shovel hit something solid.
Bonavista: Look, Theodore!
Theodore: What is it?
Bonavista: I found something.
Narrator: Bonavista carefully moved some rocks so Theodore could get a look at the whole thing. Suddenly, a large black and yellow Robot appeared. Theodore was surprise.
Theodore: What's a robot doing here in the harbour?
Bonavista: It must have washed up on shore during the storm last night.
Theodore: I have to take it to the repair dock, fast. I mean, it does look old and rusty.
Narrator: At the repair dock, Theodore pressed the robot's on switch. Suddenly, the robot sprang to life.
Bumblebee: Hello, I'm Bumblebee, the Autobot scout. What's your name?
Theodore: Theodore. Theodore Tugboat.
Bumblebee: It is nice to meet you, Theodore.