Bitcoin reversible strange transactions I am aware that a normal bitcoin transaction cannot be reversed once broadcast and confirmed on the network. My question is whether it is possible to create a strange transaction with an unusual redeem script which would allow the sender to reverse the transaction when this information is provided. 

The wallet software might not accept this transaction as spendable but this does not matter as it is supposed to be an unusual transaction. Ultimately my question is whether such a transaction is possible at all but if not, how would I go about creating it?
What you are looking for is a type of smart contract.  But be aware, that smart contracts in Bitcoin are generally comprised of multiple transactions, rather than a single transaction confirmed in a block.  You would need this initial transaction to "fund" the contract, and then further transactions that spend the outputs of the funding transaction, based on your conditions.

For example, your initial transaction can be written as to say:

"This money can be claimed by the recipient after a certain amount of time OR it can be reclaimed by me right now if I have some piece of provided information."

Now if the time period expires, it can be assumed that the recipient will create a transaction spending the outputs of the first, thus claiming the money.  However, if the sender has this special information you speak of, he can spend the outputs immediately before the recipient gets a chance.

You can use either nLocktime or OP_CHECKLOCKTIMEVERIFY for the time restriction, and you can use Lightning Network style hash locks for "when this information is provided".  Keep in mind this is just a simple example of what a potential smart contract solution would look like for you.  You would certainly need to design your own to meet your own requirements.