Visualize Time Series Data for 2 pandas dataframes

I need a Python expert, especially proficient with Pandas and plotting to combine two dataframes and plot them for a visual comparison. The dataframes contain time series data. The task involves creating a combined line and scatter plot.

Ideal Skills and Experience:
- Advanced knowledge and experience using Python and Pandas
- Proficient in data visualization techniques
- Experience with time series data analysis
- Ability to create comprehensive line and scatter plots