Rusty Dives In / Rusty's Big Top Trouble

S1, E3: Rusty Dives In / Rusty's Big Top Trouble

Available on Noggin
Ruby's tablet winds up at the bottom of the lake in 'Rusty Dives In', and in 'Rusty's Big Top Trouble', the engine on the circus train fails, so Rusty must work out how to get it back on track.