Treasure Island stars in HGTV's "Rock the Block"

What to know: For its fifth season, four returning teams with real estate stars from "Battle on the Beach," "Bargain Block," "Unsellable Houses" and "Fix My Flip" will get a shot at redemption as they compete to add the most value to waterfront homes.

• The seven-episode season is hosted by Ty Pennington, best known for "Trading Spaces" and "Extreme Makeover: Home Edition."

The challenge: The four duos will have six weeks and $250,000 to renovate attached waterfront homes on Boca Ciega Bay, each with a pool and boat dock, and turn them into luxury homes in their own style.

If you watch: The show premieres at 9pm tonight and can be streamed on Max.