Top Gear Season 20 Episode 4
Top Gear Season 20 Episode 4. The 622 hp Mercedes-Benz SLS AMG Black Series will take on the 740 hp SLS Electric Drive. YouTube/BBC

Top Gear Season 20 episode 4 airs Sunday, July 14, at 8 p.m. GMT on BBC2.

Last week, Benedict Cumberbatch, hero in BBC's Sherlock and villain in the latest Star Trek movie, had a go around the Top Gear test track in the reasonably priced car. The star posted a lap time of 1 minute 47.8 seconds.

This week, Top Gear welcomes another pop culture icon -- Wolverine. Actor Hugh Jackman visits Top Gear in Season 20 episode 4.

Also coming up this week is another one of Top Gear's outrageous challenges. Due to abnormal flooding occurring in Europe, BBC Top Gear thought it would be appropriate to challenge the three presenters to build the "ultimate hover-car." Jeremy Clarkson, Richard Hammond, and James May will test their vehicles on the river Avon of South-West England. It goes without saying that the "ambitious but rubbish" trio will present hysterical results.

Next, Jeremy Clarkson opens a discussion on the merits of an electric supercar. The 622 hp Mercedes-Benz SLS AMG Black Series will take on the 740 hp SLS Electric Drive. Clarkson expressed deep affection for the SLS cars in the past and with more than 700 hp underneath the electric model, it will be interesting to see whether he will destroy the tires are deplete the batteries first.

Watch Top Gear Season 20 Episode 4 on Sunday, July 14, at 8 p.m. GMT on BBC2!