Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
Which titles were directed by George Blair and written by Jackson Gillis?

### Inputs:
table_name: table, columns: ['Series #', 'Season #', 'Title', 'Directed by:', 'Written by:', 'Original air date']

### Response:
SELECT Title FROM table WHERE Directed by: = George Blair AND Written by: = Jackson Gillis