'Calling Equestrial Rescue, this is Deepsea Echo laboratory currently operating out of the Mareiana Trench. We were hit by some unpredicted seismic activity and in our attempt to evacuate, one of the escape pods malfunctioned. To our best understanding the docking clamps have failed to release fully but the water seal between the doors has breached, so we're trapped inside the pod. The lab is at a depth of six point eight nautical miles and the pod only has an oxygen supply to last us a few hours. Please, Equestrial Rescue if you can hear this message... help us. You're our only hope.'

Crossover with the hit 1960's TV show Thunderbirds, which is the property of the Gerry Anderson Legacy and ITV Studios.

Wonderbirds is a series of standalone, episodic one-shots and shorts, not set in a linear narrative to each other. Though presented as a series of stories, you do not have to have read previous ones to understand the narrative in each one.