Adam-12 S04E16 - The Tip

They are on a stake out for an armored truck robbery but the thieves make a clean escape. A call to the bus station about a potential rattlesnake in a suitcase turns out to be an electric toothbrush. They make contact with their source T.J. about the robberies and he a provides a few extra details as to where he overheard the threat. A call to the same bar puts them onto a man they suspect might be involved but with no proof. Malloy develops a theory on how the robberies are committed involving the sewer system. They plan a stakeout based on Malloy's theory which they execute with success.